diff --git a/docs/THIRDPARTY b/docs/THIRDPARTY
index aa72642df8..ed7bf9e809 100644
--- a/docs/THIRDPARTY
+++ b/docs/THIRDPARTY
@@ -132,6 +132,12 @@ Copyright: Google, Inc.
 License: Apache-2.0
 Comment: Material volume icon (rounded) with custom cross symbol
 
+Files: web/shared/icons/unmute.svg
+Source: https://fonts.google.com/icons?selected=Material+Symbols+Rounded:volume_up
+Copyright: Google, Inc.
+License: Apache-2.0
+Comment: Material volume up icon (rounded)
+
 Files: web/shared/icons/smart-toy.svg
 Source: https://fonts.google.com/icons?selected=Material+Symbols+Rounded:smart_toy
 Copyright: Google, Inc.
diff --git a/web/shared/icons/unmute.svg b/web/shared/icons/unmute.svg
new file mode 100644
index 0000000000..f82c654d29
Binary files /dev/null and b/web/shared/icons/unmute.svg differ
diff --git a/web/templates/topic_sidebar_actions.hbs b/web/templates/topic_sidebar_actions.hbs
index f9f0fb95d3..72fec15920 100644
--- a/web/templates/topic_sidebar_actions.hbs
+++ b/web/templates/topic_sidebar_actions.hbs
@@ -13,14 +13,14 @@
             {{#unless topic_unmuted}}
                 <li class="hidden-for-spectators">
                     <a tabindex="0" class="sidebar-popover-unmute-topic" data-stream-id="{{ stream_id }}" data-topic-name="{{ topic_name }}">
-                        <i class="zulip-icon zulip-icon-mute" aria-hidden="true"></i>
+                        <i class="zulip-icon zulip-icon-unmute" aria-hidden="true"></i>
                         {{t "Unmute topic (muted stream)"}}
                     </a>
                 </li>
             {{else}}
                 <li class="hidden-for-spectators">
                     <a tabindex="0" class="sidebar-popover-remove-unmute" data-stream-id="{{ stream_id }}" data-topic-name="{{ topic_name }}">
-                        <i class="zulip-icon zulip-icon-mute" aria-hidden="true"></i>
+                        <i class="zulip-icon zulip-icon-unmute" aria-hidden="true"></i>
                         {{t "Mute topic (muted stream)"}}
                     </a>
                 </li>