diff --git a/Block/Html/Topmenu.php b/Block/Html/Topmenu.php
index a0e5e8d..a4d57a5 100644
--- a/Block/Html/Topmenu.php
+++ b/Block/Html/Topmenu.php
@@ -76,7 +76,7 @@ protected function _addSubMenu($child, $childLevel, $childrenWrapClass, $limit)
             return $html;
         }
 
-        $colStops = null;
+        $colStops = [];
         if ($childLevel == 0 && $limit) {
             $colStops = $this->_columnBrake($child->getChildren(), $limit);
         }