diff --git a/core/includes/theme.inc b/core/includes/theme.inc
index bf46e41..4327c1e 100644
--- a/core/includes/theme.inc
+++ b/core/includes/theme.inc
@@ -3195,7 +3195,7 @@ function drupal_common_theme() {
       'variables' => array('type' => MARK_NEW),
     ),
     'item_list' => array(
-      'variables' => array('items' => array(), 'title' => '', 'tag' => 'ul', 'attributes' => array()),
+      'variables' => array('items' => array(), 'title' => '', 'list_type' => 'ul', 'attributes' => array()),
     ),
     'more_help_link' => array(
       'variables' => array('url' => NULL),