diff --git a/src/Symfony/Component/Security/Http/Authentication/AuthenticationSuccessHandlerInterface.php b/src/Symfony/Component/Security/Http/Authentication/AuthenticationSuccessHandlerInterface.php
index b1e6e27186951..25b651827b4fe 100644
--- a/src/Symfony/Component/Security/Http/Authentication/AuthenticationSuccessHandlerInterface.php
+++ b/src/Symfony/Component/Security/Http/Authentication/AuthenticationSuccessHandlerInterface.php
@@ -31,7 +31,7 @@ interface AuthenticationSuccessHandlerInterface
      * is called by authentication listeners inheriting from
      * AbstractAuthenticationListener.
      *
-     * @return Response
+     * @return Response|null
      */
     public function onAuthenticationSuccess(Request $request, TokenInterface $token);
 }