diff --git a/api_docs/changelog.md b/api_docs/changelog.md
index dc98cd0c87..05501453c7 100644
--- a/api_docs/changelog.md
+++ b/api_docs/changelog.md
@@ -162,7 +162,9 @@ No changes; feature level used for Zulip 6.0 release.
 * [`PATCH /messages/{message_id}`](/api/update-message): The
   `send_notification_to_old_thread` and
   `send_notification_to_new_thread` parameters are now respected when
-  moving a topic within a stream.
+  moving a topic within a stream. The default value for
+  `send_notification_to_old_thread` was changed from `true` to
+  `false`.
 
 **Feature level 151**