diff --git a/phpBB/viewtopic.php b/phpBB/viewtopic.php
index 2898d56e72..b5686ad3c4 100644
--- a/phpBB/viewtopic.php
+++ b/phpBB/viewtopic.php
@@ -557,6 +557,7 @@ $template->assign_vars(array(
 	'UNAPPROVED_IMG'	=> $user->img('icon_topic_unapproved', 'POST_UNAPPROVED'),
 	'WARN_IMG'			=> $user->img('icon_user_warn', 'WARN_USER'),
 
+	'S_IS_LOCKED'			=>($topic_data['topic_status'] == ITEM_UNLOCKED) ? false : true,
 	'S_SELECT_SORT_DIR' 	=> $s_sort_dir,
 	'S_SELECT_SORT_KEY' 	=> $s_sort_key,
 	'S_SELECT_SORT_DAYS' 	=> $s_limit_days,