diff --git a/admin/inc/class.admin_acl.inc.php b/admin/inc/class.admin_acl.inc.php
index 5d40e2515d..ca96314533 100644
--- a/admin/inc/class.admin_acl.inc.php
+++ b/admin/inc/class.admin_acl.inc.php
@@ -392,7 +392,7 @@ class admin_acl
 			}
 			if (!(int)$rights)
 			{
-				if (count($ids) > 1)
+				if (count((array)$ids) > 1)
 				{
 					$msg = lang('%1 ACL entries deleted.', count($ids));
 				}