diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/config/form.xml b/src/Symfony/Bundle/FrameworkBundle/Resources/config/form.xml
index 477b0f5644365..7e86fb0728a03 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/config/form.xml
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/config/form.xml
@@ -193,7 +193,7 @@
             <tag name="form.type_extension" extended-type="Symfony\Component\Form\Extension\Core\Type\SubmitType" />
         </service>
         <service id="form.type_extension.upload.validator" class="Symfony\Component\Form\Extension\Validator\Type\UploadValidatorExtension">
-            <tag name="form.type_extension" alias="form" />
+            <tag name="form.type_extension" extended-type="Symfony\Component\Form\Extension\Core\Type\FormType" />
             <argument type="service" id="translator"/>
             <argument type="string">%validator.translation_domain%</argument>
         </service>
diff --git a/src/Symfony/Component/Form/Extension/Validator/Type/UploadValidatorExtension.php b/src/Symfony/Component/Form/Extension/Validator/Type/UploadValidatorExtension.php
index 6f0fa60afd60d..d89a326f77a10 100644
--- a/src/Symfony/Component/Form/Extension/Validator/Type/UploadValidatorExtension.php
+++ b/src/Symfony/Component/Form/Extension/Validator/Type/UploadValidatorExtension.php
@@ -53,6 +53,6 @@ public function configureOptions(OptionsResolver $resolver)
      */
     public function getExtendedType()
     {
-        return 'form';
+        return 'Symfony\Component\Form\Extension\Core\Type\FormType';
     }
 }