diff --git a/src/Symfony/Bridge/Twig/Form/TwigRenderer.php b/src/Symfony/Bridge/Twig/Form/TwigRenderer.php
index ac139e44a1..2f526100f5 100644
--- a/src/Symfony/Bridge/Twig/Form/TwigRenderer.php
+++ b/src/Symfony/Bridge/Twig/Form/TwigRenderer.php
@@ -12,6 +12,7 @@
 namespace Symfony\Bridge\Twig\Form;
 
 use Symfony\Component\Form\FormRenderer;
+use Symfony\Component\Security\Csrf\CsrfTokenManagerInterface;
 
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
@@ -23,7 +24,7 @@ class TwigRenderer extends FormRenderer implements TwigRendererInterface
      */
     private $engine;
 
-    public function __construct(TwigRendererEngineInterface $engine, $csrfTokenManager = null)
+    public function __construct(TwigRendererEngineInterface $engine, CsrfTokenManagerInterface $csrfTokenManager = null)
     {
         parent::__construct($engine, $csrfTokenManager);