diff --git a/phpBB/phpbb/content_visibility.php b/phpBB/phpbb/content_visibility.php
index f1e470a8d1..f1f350a260 100644
--- a/phpBB/phpbb/content_visibility.php
+++ b/phpBB/phpbb/content_visibility.php
@@ -156,6 +156,8 @@ class content_visibility
 	*/
 	public function get_forums_visibility_sql($mode, $forum_ids = array(), $table_alias = '')
 	{
+		global $phpbb_dispatcher;
+		
 		$where_sql = '(';
 
 		$approve_forums = array_intersect($forum_ids, array_keys($this->auth->acl_getf('m_approve', true)));