diff --git a/app/code/core/Mage/Eav/Block/Adminhtml/Attribute/Set/Grid.php b/app/code/core/Mage/Eav/Block/Adminhtml/Attribute/Set/Grid.php
index 664103538..771f85e8d 100644
--- a/app/code/core/Mage/Eav/Block/Adminhtml/Attribute/Set/Grid.php
+++ b/app/code/core/Mage/Eav/Block/Adminhtml/Attribute/Set/Grid.php
@@ -41,6 +41,8 @@ protected function _prepareColumns()
             'sortable'  => true,
             'index'     => 'attribute_set_name',
         ]);
+
+        return $this;
     }
 
     public function getRowUrl($row)