diff --git a/.eslintrc.json b/.eslintrc.json
index e5a5afd96d..37f2002ba3 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -144,7 +144,6 @@
                 "emoji_picker": false,
                 "favicon": false,
                 "flatpickr": false,
-                "hash_util": false,
                 "hashchange": false,
                 "helpers": false,
                 "history": false,
diff --git a/frontend_tests/node_tests/activity.js b/frontend_tests/node_tests/activity.js
index 58573a6496..099b65b60b 100644
--- a/frontend_tests/node_tests/activity.js
+++ b/frontend_tests/node_tests/activity.js
@@ -91,7 +91,6 @@ rewiremock.enable();
 const huddle_data = zrequire("huddle_data");
 const compose_fade = zrequire("compose_fade");
 zrequire("unread");
-zrequire("hash_util");
 const narrow = zrequire("narrow");
 const presence = zrequire("presence");
 const people = zrequire("people");
diff --git a/frontend_tests/node_tests/compose_actions.js b/frontend_tests/node_tests/compose_actions.js
index 6971c24e68..64e359b29c 100644
--- a/frontend_tests/node_tests/compose_actions.js
+++ b/frontend_tests/node_tests/compose_actions.js
@@ -21,7 +21,9 @@ const compose_pm_pill = {__esModule: true};
 
 rewiremock("../../static/js/compose_pm_pill").with(compose_pm_pill);
 
-const hash_util = set_global("hash_util", {});
+const hash_util = {__esModule: true};
+
+rewiremock("../../static/js/hash_util").with(hash_util);
 
 rewiremock("../../static/js/reload_state").with({
     is_in_progress: () => false,
diff --git a/frontend_tests/node_tests/markdown.js b/frontend_tests/node_tests/markdown.js
index 166a44d7a2..3e0d13d9a3 100644
--- a/frontend_tests/node_tests/markdown.js
+++ b/frontend_tests/node_tests/markdown.js
@@ -32,7 +32,6 @@ set_global("Image", Image);
 const doc = "";
 set_global("document", doc);
 
-zrequire("hash_util");
 const emoji = zrequire("emoji", "shared/js/emoji");
 const emoji_codes = zrequire("emoji_codes", "generated/emoji/emoji_codes.json");
 const pygments_data = zrequire("pygments_data", "generated/pygments_data.json");
diff --git a/frontend_tests/node_tests/markdown_katex.js b/frontend_tests/node_tests/markdown_katex.js
index 85443d2a30..b2df1eb0ef 100644
--- a/frontend_tests/node_tests/markdown_katex.js
+++ b/frontend_tests/node_tests/markdown_katex.js
@@ -22,7 +22,6 @@ rewiremock("katex").with({
 rewiremock.enable();
 
 const markdown_config = zrequire("markdown_config");
-zrequire("hash_util");
 zrequire("message_store");
 
 const markdown = zrequire("markdown");
diff --git a/frontend_tests/node_tests/peer_data.js b/frontend_tests/node_tests/peer_data.js
index f3e7ca844f..51b00a9154 100644
--- a/frontend_tests/node_tests/peer_data.js
+++ b/frontend_tests/node_tests/peer_data.js
@@ -13,7 +13,6 @@ const {run_test} = require("../zjsunit/test");
 
 const peer_data = zrequire("peer_data");
 const people = zrequire("people");
-zrequire("hash_util");
 const stream_data = zrequire("stream_data");
 
 set_global("page_params", {
diff --git a/frontend_tests/node_tests/pm_list.js b/frontend_tests/node_tests/pm_list.js
index d72c596028..379dc44e7b 100644
--- a/frontend_tests/node_tests/pm_list.js
+++ b/frontend_tests/node_tests/pm_list.js
@@ -32,7 +32,6 @@ rewiremock.enable();
 
 zrequire("presence");
 zrequire("buddy_data");
-zrequire("hash_util");
 const people = zrequire("people");
 const pm_conversations = zrequire("pm_conversations");
 const pm_list = zrequire("pm_list");
diff --git a/frontend_tests/node_tests/popovers.js b/frontend_tests/node_tests/popovers.js
index 5e5d275c91..f6bf648546 100644
--- a/frontend_tests/node_tests/popovers.js
+++ b/frontend_tests/node_tests/popovers.js
@@ -46,7 +46,6 @@ rewiremock("clipboard").with(ClipboardJS);
 
 rewiremock.enable();
 
-zrequire("hash_util");
 zrequire("narrow");
 const people = zrequire("people");
 zrequire("presence");
diff --git a/frontend_tests/node_tests/recent_topics.js b/frontend_tests/node_tests/recent_topics.js
index 585bb59234..b585e12384 100644
--- a/frontend_tests/node_tests/recent_topics.js
+++ b/frontend_tests/node_tests/recent_topics.js
@@ -47,7 +47,7 @@ set_global("unread", {
         },
     },
 });
-set_global("hash_util", {
+rewiremock("../../static/js/hash_util").with({
     by_stream_uri: () => "https://www.example.com",
     by_stream_topic_uri: () => "https://www.example.com",
 });
diff --git a/frontend_tests/node_tests/stream_data.js b/frontend_tests/node_tests/stream_data.js
index 651da9841e..126e969ed1 100644
--- a/frontend_tests/node_tests/stream_data.js
+++ b/frontend_tests/node_tests/stream_data.js
@@ -14,7 +14,6 @@ const page_params = set_global("page_params", {
 });
 
 const color_data = zrequire("color_data");
-zrequire("hash_util");
 const stream_topic_history = zrequire("stream_topic_history");
 const people = zrequire("people");
 const stream_color = zrequire("stream_color");
diff --git a/frontend_tests/node_tests/stream_edit.js b/frontend_tests/node_tests/stream_edit.js
index 329a8bfc23..faadd8d16f 100644
--- a/frontend_tests/node_tests/stream_edit.js
+++ b/frontend_tests/node_tests/stream_edit.js
@@ -14,7 +14,7 @@ stub_templates(() => noop);
 
 rewiremock("../../static/js/channel").with({});
 set_global("hashchange", {update_browser_history: noop});
-set_global("hash_util", {
+rewiremock("../../static/js/hash_util").with({
     stream_edit_uri: noop,
     by_stream_uri: noop,
 });
diff --git a/frontend_tests/node_tests/stream_list.js b/frontend_tests/node_tests/stream_list.js
index 389f978e7f..587f0bb05e 100644
--- a/frontend_tests/node_tests/stream_list.js
+++ b/frontend_tests/node_tests/stream_list.js
@@ -32,7 +32,6 @@ rewiremock.enable();
 const {Filter} = zrequire("Filter", "js/filter");
 const stream_sort = zrequire("stream_sort");
 const stream_color = zrequire("stream_color");
-zrequire("hash_util");
 const unread = zrequire("unread");
 const stream_data = zrequire("stream_data");
 const scroll_util = zrequire("scroll_util");
diff --git a/frontend_tests/node_tests/subs.js b/frontend_tests/node_tests/subs.js
index cd05c21fbf..10c61284f7 100644
--- a/frontend_tests/node_tests/subs.js
+++ b/frontend_tests/node_tests/subs.js
@@ -2,6 +2,8 @@
 
 const {strict: assert} = require("assert");
 
+const rewiremock = require("rewiremock/node");
+
 const {stub_templates} = require("../zjsunit/handlebars");
 const {set_global, zrequire} = require("../zjsunit/namespace");
 const {run_test} = require("../zjsunit/test");
@@ -19,10 +21,12 @@ set_global("location", {
     hash: `#streams/${denmark_stream_id}/announce`,
 });
 
-set_global("hash_util", {
+rewiremock("../../static/js/hash_util").with({
     by_stream_uri: () => {},
 });
 
+rewiremock.enable();
+
 const stream_data = zrequire("stream_data");
 const subs = zrequire("subs");
 
@@ -205,3 +209,4 @@ run_test("redraw_left_panel", (override) => {
     assert(!$(".right .settings").visible());
     assert($(".nothing-selected").visible());
 });
+rewiremock.disable();
diff --git a/frontend_tests/node_tests/topic_list_data.js b/frontend_tests/node_tests/topic_list_data.js
index 1654419cfb..d82920e94f 100644
--- a/frontend_tests/node_tests/topic_list_data.js
+++ b/frontend_tests/node_tests/topic_list_data.js
@@ -26,7 +26,6 @@ set_global("message_list", {});
 
 rewiremock.enable();
 
-zrequire("hash_util");
 const stream_data = zrequire("stream_data");
 const unread = zrequire("unread");
 const stream_topic_history = zrequire("stream_topic_history");
diff --git a/frontend_tests/node_tests/typeahead_helper.js b/frontend_tests/node_tests/typeahead_helper.js
index 289adc951a..85019d0709 100644
--- a/frontend_tests/node_tests/typeahead_helper.js
+++ b/frontend_tests/node_tests/typeahead_helper.js
@@ -19,7 +19,6 @@ const peer_data = zrequire("peer_data");
 const people = zrequire("people");
 const stream_data = zrequire("stream_data");
 zrequire("narrow");
-zrequire("hash_util");
 
 const emoji = zrequire("emoji", "shared/js/emoji");
 const pygments_data = zrequire("pygments_data", "generated/pygments_data.json");
diff --git a/frontend_tests/node_tests/ui_init.js b/frontend_tests/node_tests/ui_init.js
index f4d845dffb..d57034c8e8 100644
--- a/frontend_tests/node_tests/ui_init.js
+++ b/frontend_tests/node_tests/ui_init.js
@@ -109,7 +109,6 @@ rewiremock.enable();
 
 const util = zrequire("util");
 
-zrequire("hash_util");
 zrequire("message_view_header");
 zrequire("presence");
 zrequire("search_pill_widget");
diff --git a/static/js/buddy_data.js b/static/js/buddy_data.js
index 9f3d05f58d..b013b9e831 100644
--- a/static/js/buddy_data.js
+++ b/static/js/buddy_data.js
@@ -1,6 +1,7 @@
 "use strict";
 
 const compose_fade = require("./compose_fade");
+const hash_util = require("./hash_util");
 const people = require("./people");
 const user_status = require("./user_status");
 const util = require("./util");
diff --git a/static/js/bundles/app.js b/static/js/bundles/app.js
index 953a7a8bde..4c0886ae3c 100644
--- a/static/js/bundles/app.js
+++ b/static/js/bundles/app.js
@@ -30,7 +30,6 @@ import "../ui";
 import "../composebox_typeahead";
 import "../hotkey";
 import "../notifications";
-import "../hash_util";
 import "../hashchange";
 import "../message_flags";
 import "../starred_messages";
diff --git a/static/js/click_handlers.js b/static/js/click_handlers.js
index f783b84b6e..201c5134c8 100644
--- a/static/js/click_handlers.js
+++ b/static/js/click_handlers.js
@@ -9,6 +9,7 @@ import render_buddy_list_tooltip_content from "../templates/buddy_list_tooltip_c
 import * as channel from "./channel";
 import * as compose from "./compose";
 import * as compose_state from "./compose_state";
+import * as hash_util from "./hash_util";
 import * as message_edit from "./message_edit";
 import * as message_edit_history from "./message_edit_history";
 import * as muting_ui from "./muting_ui";
diff --git a/static/js/compose_actions.js b/static/js/compose_actions.js
index 7fd61dd40c..79fd5ed5e5 100644
--- a/static/js/compose_actions.js
+++ b/static/js/compose_actions.js
@@ -11,6 +11,7 @@ const compose_fade = require("./compose_fade");
 const compose_pm_pill = require("./compose_pm_pill");
 const compose_state = require("./compose_state");
 const drafts = require("./drafts");
+const hash_util = require("./hash_util");
 const message_viewport = require("./message_viewport");
 const narrow_state = require("./narrow_state");
 const notifications = require("./notifications");
diff --git a/static/js/global.d.ts b/static/js/global.d.ts
index a7c7cc290c..7bf9177ba8 100644
--- a/static/js/global.d.ts
+++ b/static/js/global.d.ts
@@ -22,7 +22,6 @@ declare let emoji: any;
 declare let emoji_picker: any;
 declare let favicon: any;
 declare let hashchange: any;
-declare let hash_util: any;
 declare let helpers: any;
 declare let home_msg_list: any;
 declare let hotspots: any;
diff --git a/static/js/hash_util.js b/static/js/hash_util.js
index 2123e44ee6..fb83d6c167 100644
--- a/static/js/hash_util.js
+++ b/static/js/hash_util.js
@@ -1,16 +1,14 @@
-"use strict";
+import * as narrow_state from "./narrow_state";
+import * as people from "./people";
+import * as stream_data from "./stream_data";
+import * as ui_report from "./ui_report";
 
-const narrow_state = require("./narrow_state");
-const people = require("./people");
-const stream_data = require("./stream_data");
-const ui_report = require("./ui_report");
-
-exports.get_hash_category = function (hash) {
+export function get_hash_category(hash) {
     // given "#streams/subscribed", returns "streams"
     return hash ? hash.replace(/^#/, "").split(/\//)[0] : "";
-};
+}
 
-exports.get_hash_section = function (hash) {
+export function get_hash_section(hash) {
     // given "#settings/your-account", returns "your-account"
     // given '#streams/5/social", returns "5"
     if (!hash) {
@@ -20,16 +18,16 @@ exports.get_hash_section = function (hash) {
     const parts = hash.replace(/\/$/, "").split(/\//);
 
     return parts[1] || "";
-};
+}
 
 // Some browsers zealously URI-decode the contents of
 // window.location.hash.  So we hide our URI-encoding
 // by replacing % with . (like MediaWiki).
-exports.encodeHashComponent = function (str) {
+export function encodeHashComponent(str) {
     return encodeURIComponent(str).replace(/\./g, "%2E").replace(/%/g, ".");
-};
+}
 
-exports.encode_operand = function (operator, operand) {
+export function encode_operand(operator, operand) {
     if (operator === "group-pm-with" || operator === "pm-with" || operator === "sender") {
         const slug = people.emails_to_slug(operand);
         if (slug) {
@@ -38,29 +36,29 @@ exports.encode_operand = function (operator, operand) {
     }
 
     if (operator === "stream") {
-        return exports.encode_stream_name(operand);
+        return encode_stream_name(operand);
     }
 
-    return exports.encodeHashComponent(operand);
-};
+    return encodeHashComponent(operand);
+}
 
-exports.encode_stream_id = function (stream_id) {
+export function encode_stream_id(stream_id) {
     // stream_data appends the stream name, but it does not do the
     // URI encoding piece
     const slug = stream_data.id_to_slug(stream_id);
 
-    return exports.encodeHashComponent(slug);
-};
+    return encodeHashComponent(slug);
+}
 
-exports.encode_stream_name = function (operand) {
+export function encode_stream_name(operand) {
     // stream_data prefixes the stream id, but it does not do the
     // URI encoding piece
     operand = stream_data.name_to_slug(operand);
 
-    return exports.encodeHashComponent(operand);
-};
+    return encodeHashComponent(operand);
+}
 
-exports.decodeHashComponent = function (str) {
+export function decodeHashComponent(str) {
     try {
         // This fails for URLs containing
         // foo.foo or foo%foo due to our fault in special handling
@@ -73,9 +71,9 @@ exports.decodeHashComponent = function (str) {
         ui_report.error(i18n.t("Invalid URL"), undefined, $("#home-error"), 2000);
         return "";
     }
-};
+}
 
-exports.decode_operand = function (operator, operand) {
+export function decode_operand(operator, operand) {
     if (operator === "group-pm-with" || operator === "pm-with" || operator === "sender") {
         const emails = people.slug_to_emails(operand);
         if (emails) {
@@ -83,32 +81,27 @@ exports.decode_operand = function (operator, operand) {
         }
     }
 
-    operand = exports.decodeHashComponent(operand);
+    operand = decodeHashComponent(operand);
 
     if (operator === "stream") {
         return stream_data.slug_to_name(operand);
     }
 
     return operand;
-};
+}
 
-exports.by_stream_uri = function (stream_id) {
-    return "#narrow/stream/" + exports.encode_stream_id(stream_id);
-};
+export function by_stream_uri(stream_id) {
+    return "#narrow/stream/" + encode_stream_id(stream_id);
+}
 
-exports.by_stream_topic_uri = function (stream_id, topic) {
-    return (
-        "#narrow/stream/" +
-        exports.encode_stream_id(stream_id) +
-        "/topic/" +
-        exports.encodeHashComponent(topic)
-    );
-};
+export function by_stream_topic_uri(stream_id, topic) {
+    return "#narrow/stream/" + encode_stream_id(stream_id) + "/topic/" + encodeHashComponent(topic);
+}
 
 // Encodes an operator list into the
 // corresponding hash: the # component
 // of the narrow URL
-exports.operators_to_hash = function (operators) {
+export function operators_to_hash(operators) {
     let hash = "#";
 
     if (operators !== undefined) {
@@ -123,33 +116,33 @@ exports.operators_to_hash = function (operators) {
             hash +=
                 "/" +
                 sign +
-                exports.encodeHashComponent(operator) +
+                encodeHashComponent(operator) +
                 "/" +
-                exports.encode_operand(operator, operand);
+                encode_operand(operator, operand);
         }
     }
 
     return hash;
-};
+}
 
-exports.by_sender_uri = function (reply_to) {
-    return exports.operators_to_hash([{operator: "sender", operand: reply_to}]);
-};
+export function by_sender_uri(reply_to) {
+    return operators_to_hash([{operator: "sender", operand: reply_to}]);
+}
 
-exports.pm_with_uri = function (reply_to) {
+export function pm_with_uri(reply_to) {
     const slug = people.emails_to_slug(reply_to);
     return "#narrow/pm-with/" + slug;
-};
+}
 
-exports.huddle_with_uri = function (user_ids_string) {
+export function huddle_with_uri(user_ids_string) {
     // This method is convenient for callers
     // that have already converted emails to a comma-delimited
     // list of user_ids.  We should be careful to keep this
     // consistent with hash_util.decode_operand.
     return "#narrow/pm-with/" + user_ids_string + "-group";
-};
+}
 
-exports.by_conversation_and_time_uri = function (message) {
+export function by_conversation_and_time_uri(message) {
     const absolute_url =
         window.location.protocol +
         "//" +
@@ -157,36 +150,34 @@ exports.by_conversation_and_time_uri = function (message) {
         "/" +
         window.location.pathname.split("/")[1];
 
-    const suffix = "/near/" + exports.encodeHashComponent(message.id);
+    const suffix = "/near/" + encodeHashComponent(message.id);
 
     if (message.type === "stream") {
-        return (
-            absolute_url + exports.by_stream_topic_uri(message.stream_id, message.topic) + suffix
-        );
+        return absolute_url + by_stream_topic_uri(message.stream_id, message.topic) + suffix;
     }
 
     return absolute_url + people.pm_perma_link(message) + suffix;
-};
+}
 
-exports.stream_edit_uri = function (sub) {
-    const hash = `#streams/${sub.stream_id}/${exports.encodeHashComponent(sub.name)}`;
+export function stream_edit_uri(sub) {
+    const hash = `#streams/${sub.stream_id}/${encodeHashComponent(sub.name)}`;
     return hash;
-};
+}
 
-exports.search_public_streams_notice_url = function () {
+export function search_public_streams_notice_url() {
     // Computes the URL of the current narrow if streams:public were added.
     const operators = narrow_state.filter().operators();
     const public_operator = {operator: "streams", operand: "public"};
-    return exports.operators_to_hash([public_operator].concat(operators));
-};
+    return operators_to_hash([public_operator].concat(operators));
+}
 
-exports.parse_narrow = function (hash) {
+export function parse_narrow(hash) {
     let i;
     const operators = [];
     for (i = 1; i < hash.length; i += 2) {
         // We don't construct URLs with an odd number of components,
         // but the user might write one.
-        let operator = exports.decodeHashComponent(hash[i]);
+        let operator = decodeHashComponent(hash[i]);
         // Do not parse further if empty operator encountered.
         if (operator === "") {
             break;
@@ -204,10 +195,8 @@ exports.parse_narrow = function (hash) {
             operator = operator.slice(1);
         }
 
-        const operand = exports.decode_operand(operator, raw_operand);
+        const operand = decode_operand(operator, raw_operand);
         operators.push({negated, operator, operand});
     }
     return operators;
-};
-
-window.hash_util = exports;
+}
diff --git a/static/js/hashchange.js b/static/js/hashchange.js
index ed24c5428d..fdab46a13b 100644
--- a/static/js/hashchange.js
+++ b/static/js/hashchange.js
@@ -2,6 +2,7 @@
 
 const drafts = require("./drafts");
 const floating_recipient_bar = require("./floating_recipient_bar");
+const hash_util = require("./hash_util");
 const info_overlay = require("./info_overlay");
 const invite = require("./invite");
 const message_viewport = require("./message_viewport");
diff --git a/static/js/markdown_config.js b/static/js/markdown_config.js
index 221de8ba66..371a4f39fc 100644
--- a/static/js/markdown_config.js
+++ b/static/js/markdown_config.js
@@ -1,3 +1,4 @@
+import * as hash_util from "./hash_util";
 import * as people from "./people";
 import * as stream_data from "./stream_data";
 import * as user_groups from "./user_groups";
diff --git a/static/js/message_list_view.js b/static/js/message_list_view.js
index 382d29351d..c61e9fb15b 100644
--- a/static/js/message_list_view.js
+++ b/static/js/message_list_view.js
@@ -9,6 +9,7 @@ import render_single_message from "../templates/single_message.hbs";
 import * as compose from "./compose";
 import * as compose_fade from "./compose_fade";
 import * as condense from "./condense";
+import * as hash_util from "./hash_util";
 import * as message_edit from "./message_edit";
 import * as message_viewport from "./message_viewport";
 import * as narrow_state from "./narrow_state";
diff --git a/static/js/message_scroll.js b/static/js/message_scroll.js
index d2a2c4aa8c..32ffe0a4f9 100644
--- a/static/js/message_scroll.js
+++ b/static/js/message_scroll.js
@@ -1,6 +1,7 @@
 import _ from "lodash";
 
 import * as floating_recipient_bar from "./floating_recipient_bar";
+import * as hash_util from "./hash_util";
 import * as loading from "./loading";
 import * as message_viewport from "./message_viewport";
 import * as narrow_state from "./narrow_state";
diff --git a/static/js/pm_list.js b/static/js/pm_list.js
index 4b9763b670..d0c0971e62 100644
--- a/static/js/pm_list.js
+++ b/static/js/pm_list.js
@@ -1,3 +1,4 @@
+import * as hash_util from "./hash_util";
 import * as narrow_state from "./narrow_state";
 import * as people from "./people";
 import * as pm_conversations from "./pm_conversations";
diff --git a/static/js/popovers.js b/static/js/popovers.js
index 7f645bf245..92044c0bbd 100644
--- a/static/js/popovers.js
+++ b/static/js/popovers.js
@@ -16,6 +16,7 @@ import render_user_profile_modal from "../templates/user_profile_modal.hbs";
 import * as compose_state from "./compose_state";
 import * as condense from "./condense";
 import * as feature_flags from "./feature_flags";
+import * as hash_util from "./hash_util";
 import * as message_edit from "./message_edit";
 import * as message_edit_history from "./message_edit_history";
 import * as message_viewport from "./message_viewport";
diff --git a/static/js/recent_topics.js b/static/js/recent_topics.js
index 444fcb2baf..bcdaf3823b 100644
--- a/static/js/recent_topics.js
+++ b/static/js/recent_topics.js
@@ -5,6 +5,7 @@ const render_recent_topics_filters = require("../templates/recent_topics_filters
 const render_recent_topics_body = require("../templates/recent_topics_table.hbs");
 
 const drafts = require("./drafts");
+const hash_util = require("./hash_util");
 const ListWidget = require("./list_widget");
 const {localstorage} = require("./localstorage");
 const muting = require("./muting");
diff --git a/static/js/reminder.js b/static/js/reminder.js
index 02f93bde7d..7eea1e7734 100644
--- a/static/js/reminder.js
+++ b/static/js/reminder.js
@@ -2,6 +2,7 @@
 
 const channel = require("./channel");
 const compose = require("./compose");
+const hash_util = require("./hash_util");
 const notifications = require("./notifications");
 const people = require("./people");
 const transmit = require("./transmit");
diff --git a/static/js/stream_data.js b/static/js/stream_data.js
index f152dac31c..5824fe1c1d 100644
--- a/static/js/stream_data.js
+++ b/static/js/stream_data.js
@@ -1,5 +1,6 @@
 import * as color_data from "./color_data";
 import {FoldDict} from "./fold_dict";
+import * as hash_util from "./hash_util";
 import * as peer_data from "./peer_data";
 import * as people from "./people";
 import * as settings_config from "./settings_config";
diff --git a/static/js/stream_edit.js b/static/js/stream_edit.js
index dab9935d64..9257b22586 100644
--- a/static/js/stream_edit.js
+++ b/static/js/stream_edit.js
@@ -5,6 +5,7 @@ import render_subscription_settings from "../templates/subscription_settings.hbs
 import render_subscription_stream_privacy_modal from "../templates/subscription_stream_privacy_modal.hbs";
 
 import * as channel from "./channel";
+import * as hash_util from "./hash_util";
 import * as ListWidget from "./list_widget";
 import * as narrow_state from "./narrow_state";
 import * as overlays from "./overlays";
diff --git a/static/js/stream_list.js b/static/js/stream_list.js
index ace7998615..975a9e0114 100644
--- a/static/js/stream_list.js
+++ b/static/js/stream_list.js
@@ -5,6 +5,7 @@ const _ = require("lodash");
 const render_stream_privacy = require("../templates/stream_privacy.hbs");
 const render_stream_sidebar_row = require("../templates/stream_sidebar_row.hbs");
 
+const hash_util = require("./hash_util");
 const keydown_util = require("./keydown_util");
 const {ListCursor} = require("./list_cursor");
 const narrow_state = require("./narrow_state");
diff --git a/static/js/stream_popover.js b/static/js/stream_popover.js
index 9783f8e25b..c4592a830b 100644
--- a/static/js/stream_popover.js
+++ b/static/js/stream_popover.js
@@ -7,6 +7,7 @@ import render_topic_sidebar_actions from "../templates/topic_sidebar_actions.hbs
 import render_unstar_messages_modal from "../templates/unstar_messages_modal.hbs";
 
 import * as channel from "./channel";
+import * as hash_util from "./hash_util";
 import * as message_edit from "./message_edit";
 import * as muting from "./muting";
 import * as muting_ui from "./muting_ui";
diff --git a/static/js/subs.js b/static/js/subs.js
index f82bd726d1..e29c546120 100644
--- a/static/js/subs.js
+++ b/static/js/subs.js
@@ -10,6 +10,7 @@ const render_subscriptions = require("../templates/subscriptions.hbs");
 const channel = require("./channel");
 const components = require("./components");
 const compose_state = require("./compose_state");
+const hash_util = require("./hash_util");
 const loading = require("./loading");
 const message_live_update = require("./message_live_update");
 const overlays = require("./overlays");
diff --git a/static/js/topic_list_data.js b/static/js/topic_list_data.js
index 3b7331054c..676b3c4d22 100644
--- a/static/js/topic_list_data.js
+++ b/static/js/topic_list_data.js
@@ -1,3 +1,4 @@
+import * as hash_util from "./hash_util";
 import * as muting from "./muting";
 import * as narrow_state from "./narrow_state";
 import * as stream_topic_history from "./stream_topic_history";