diff --git a/mod/forum/lang/en/forum.php b/mod/forum/lang/en/forum.php
index 659ec8b9872..697fc0c03f7 100644
--- a/mod/forum/lang/en/forum.php
+++ b/mod/forum/lang/en/forum.php
@@ -179,7 +179,6 @@ $string['forums'] = 'Forums';
 $string['forum:splitdiscussions'] = 'Split discussions';
 $string['forum:startdiscussion'] = 'Start new discussions';
 $string['forumsubjecthidden'] = 'Subject (hidden)';
-$string['forum:throttlingapplies'] = 'Throttling applies';
 $string['forumtracked'] = 'Unread posts are being tracked';
 $string['forumtrackednot'] = 'Unread posts are not being tracked';
 $string['forumtype'] = 'Forum type';