diff --git a/src/Symfony/Component/Security/Core/Security.php b/src/Symfony/Component/Security/Core/Security.php
index <HASH>..<HASH> 100644
--- a/src/Symfony/Component/Security/Core/Security.php
+++ b/src/Symfony/Component/Security/Core/Security.php
@@ -13,6 +13,7 @@ namespace Symfony\Component\Security\Core;
 
 use Psr\Container\ContainerInterface;
 use Symfony\Component\Security\Core\Authentication\Token\TokenInterface;
+use Symfony\Component\Security\Core\Authorization\AuthorizationCheckerInterface;
 use Symfony\Component\Security\Core\User\UserInterface;
 
 /**
@@ -20,7 +21,7 @@ use Symfony\Component\Security\Core\User\UserInterface;
  *
  * @final
  */
-class Security
+class Security implements AuthorizationCheckerInterface
 {
     const ACCESS_DENIED_ERROR = '_security.403_error';
     const AUTHENTICATION_ERROR = '_security.last_error';
[Security] class Security implements AuthorizationCheckerInterface

The class has the method of AuthorizationCheckerInterface already.