diff --git a/modules/comment/comment.model.php b/modules/comment/comment.model.php
index 645ae15bd..eea91c856 100644
--- a/modules/comment/comment.model.php
+++ b/modules/comment/comment.model.php
@@ -728,7 +728,7 @@ class commentModel extends comment
 	 */
 	public static function _arrangeComment(&$comment_list, $list, $depth, $parent = NULL)
 	{
-		if(!count($list))
+		if(!is_array($list) || !count($list))
 		{
 			return;
 		}