diff --git a/src/Symfony/Component/Security/Http/Firewall/SwitchUserListener.php b/src/Symfony/Component/Security/Http/Firewall/SwitchUserListener.php
index d8ae42d2ea..396b739559 100644
--- a/src/Symfony/Component/Security/Http/Firewall/SwitchUserListener.php
+++ b/src/Symfony/Component/Security/Http/Firewall/SwitchUserListener.php
@@ -17,6 +17,7 @@ use Symfony\Component\Security\Core\User\UserProviderInterface;
 use Symfony\Component\Security\Core\User\AccountCheckerInterface;
 use Symfony\Component\Security\Core\Authorization\AccessDecisionManagerInterface;
 use Symfony\Component\HttpKernel\Log\LoggerInterface;
+use Symfony\Component\EventDispatcher\Event;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
 use Symfony\Component\EventDispatcher\EventInterface;
 use Symfony\Component\Security\Core\Exception\AuthenticationException;