diff --git a/src/Symfony/Bundle/TwigBundle/Controller/PreviewErrorController.php b/src/Symfony/Bundle/TwigBundle/Controller/PreviewErrorController.php
index c529cfbb46d83..fc291707020ff 100644
--- a/src/Symfony/Bundle/TwigBundle/Controller/PreviewErrorController.php
+++ b/src/Symfony/Bundle/TwigBundle/Controller/PreviewErrorController.php
@@ -47,7 +47,6 @@ public function previewErrorPageAction(Request $request, $code)
             '_controller' => $this->controller,
             'exception' => $exception,
             'logger' => null,
-            'format' => $request->getRequestFormat(),
             'showException' => false,
         ]);