diff --git a/upload/modcp.php b/upload/modcp.php
index dbb9ed568..8939c3559 100644
--- a/upload/modcp.php
+++ b/upload/modcp.php
@@ -211,7 +211,7 @@ switch ($mode)
 		}
 
 		$req_topics = isset($_POST['topic_id_list']) ? $_POST['topic_id_list'] : $topic_id;
-		validate_topics($forum_id, &$req_topics, &$topic_titles);
+		validate_topics($forum_id, $req_topics, $topic_titles);
 
 		if (!$req_topics OR !$topic_csv = get_id_csv($req_topics))
 		{