diff --git a/extensions/lang-english/locale/flarum-mentions.yml b/extensions/lang-english/locale/flarum-mentions.yml
index c4419dc57..6a294c747 100644
--- a/extensions/lang-english/locale/flarum-mentions.yml
+++ b/extensions/lang-english/locale/flarum-mentions.yml
@@ -9,6 +9,7 @@ flarum-mentions:
 
     # These translations are used by the composer (reply autocompletion function).
     composer:
+      mention_tooltip: Mention a user or post
       reply_to_post_text: "Reply to #{number}"
 
     # These translations are used by the Notifications dropdown, a.k.a. "the bell".