diff --git a/core/includes/theme.inc b/core/includes/theme.inc
index 65a939d..44815f8 100644
--- a/core/includes/theme.inc
+++ b/core/includes/theme.inc
@@ -2390,7 +2390,7 @@ function template_preprocess_item_list(&$variables) {
   if (!empty($variables['attributes']['class'])) {
     $variables['attributes']['class'] = array_diff($variables['attributes']['class'], array('item-list'));
     if (empty($variables['attributes']['class'])) {
-      unset ($variables['attributes']['class']);
+      unset($variables['attributes']['class']);
     }
   }