diff --git a/templates/zerver/help/import-from-gitter.md b/templates/zerver/help/import-from-gitter.md
index f87ed71470..bd40280269 100644
--- a/templates/zerver/help/import-from-gitter.md
+++ b/templates/zerver/help/import-from-gitter.md
@@ -3,7 +3,13 @@
 Zulip supports importing data from Gitter, including users, channels,
 messages, attachments, and avatars.
 
-First, you need to do some things in Gitter to setup the export:
+**Note:** You can only import a Gitter room as a new Zulip organization. In
+particular, this tool you cannot use this tool to import from Gitter into an
+existing Zulip organization.
+
+## Import from Gitter
+
+First, export your data from Gitter.
 
 1. [Export your Gitter data](https://github.com/minrk/archive-gitter). You will
    receive json files of the public rooms that you are a part of.
diff --git a/templates/zerver/help/import-from-slack.md b/templates/zerver/help/import-from-slack.md
index 97742ac861..c823256fd6 100644
--- a/templates/zerver/help/import-from-slack.md
+++ b/templates/zerver/help/import-from-slack.md
@@ -4,7 +4,13 @@ Starting with Zulip 1.8, Zulip supports importing data from Slack,
 including users, channels, messages, attachments, avatars, custom
 emoji, and emoji reactions.
 
-First, you need to do some things in Slack to setup the export:
+**Note:** You can only import a Slack workspace as a new Zulip
+organization. In particular, you cannot use this tool to import from Slack
+into an existing Zulip organization.
+
+## Import from Slack
+
+First, export your data from Slack.
 
 1. [Export your Slack data](https://my.slack.com/services/export). You will
    receive a zip file `slack_data.zip`.