diff --git a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/RememberMeFactory.php b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/RememberMeFactory.php
index fe932315b8ef9..1cde3073fb198 100644
--- a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/RememberMeFactory.php
+++ b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/RememberMeFactory.php
@@ -134,6 +134,8 @@ public function addConfiguration(NodeDefinition $node)
                     $v['secret'] = $v['key'];
 
                     unset($v['key']);
+
+                    return $v;
                 })
                 ->end()
             ->children();