diff --git a/security/expressions.rst b/security/expressions.rst
index 2013d6656d7..fefee9bac17 100644
--- a/security/expressions.rst
+++ b/security/expressions.rst
@@ -18,7 +18,7 @@ accepts an :class:`Symfony\\Component\\ExpressionLanguage\\Expression` object::
     public function index()
     {
         $this->denyAccessUnlessGranted(new Expression(
-            '"ROLE_ADMIN" in roles or (not is_anonymous() and user.isSuperAdmin())'
+            '"ROLE_ADMIN" in role_names or (not is_anonymous() and user.isSuperAdmin())'
         ));
 
         // ...