diff --git a/Form/CustomFieldType.php b/Form/CustomFieldType.php
index db6191e7c..fd82f43c1 100644
--- a/Form/CustomFieldType.php
+++ b/Form/CustomFieldType.php
@@ -113,10 +113,8 @@ class CustomFieldType extends AbstractType
         ));
 
         $resolver->setRequired(array('type', 'group_widget'))
-              ->addAllowedValues(array(
-                 'type' => array_keys($this->customFieldProvider->getAllFields()),
-                 'group_widget' => array('hidden', 'entity')
-              ))
+              ->addAllowedValues('type', array_keys($this->customFieldProvider->getAllFields()))
+              ->addAllowedValues('group_widget', array('hidden', 'entity'))
               ->setDefault('group_widget', 'entity');
     }