diff --git a/cookbook/security/acl.rst b/cookbook/security/acl.rst
index 53433337a22..24cbedbf26e 100644
--- a/cookbook/security/acl.rst
+++ b/cookbook/security/acl.rst
@@ -108,7 +108,7 @@ Creating an ACL, and adding an ACE
     use Symfony\Component\Security\Acl\Domain\UserSecurityIdentity;
     use Symfony\Component\Security\Acl\Permission\MaskBuilder;
 
-    class BlogController
+    class BlogController extends Controller
     {
         // ...