diff --git a/lib/Controller/MVCGrid.php b/lib/Controller/MVCGrid.php
index <HASH>..<HASH> 100644
--- a/lib/Controller/MVCGrid.php
+++ b/lib/Controller/MVCGrid.php
@@ -79,7 +79,7 @@ class Controller_MVCGrid extends AbstractController
 
         $field_name = $field->short_name;
 
-        if ($field instanceof Model_Field_Reference) {
+        if ($field instanceof Field_Reference) {
             $field_name = $field->getDereferenced();
         }
fix bug in Controller_MVCGrid