diff --git a/StorageBundle/DependencyInjection/StorageExtension.php b/StorageBundle/DependencyInjection/StorageExtension.php
index a83b3eb..a8d26da 100644
--- a/StorageBundle/DependencyInjection/StorageExtension.php
+++ b/StorageBundle/DependencyInjection/StorageExtension.php
@@ -4,6 +4,7 @@ namespace Bluesquare\StorageBundle\DependencyInjection;
 
 use Symfony\Component\Config\FileLocator;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Definition;
 use Symfony\Component\DependencyInjection\Extension\Extension;
 use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
 
diff --git a/StorageBundle/Ressources/config/services.yaml b/StorageBundle/Ressources/config/services.yaml
index 03ad26c..4d39a75 100644
--- a/StorageBundle/Ressources/config/services.yaml
+++ b/StorageBundle/Ressources/config/services.yaml
@@ -3,5 +3,5 @@ services:
     class: Bluesquare\StorageBundle\Storage
     autowire: true
     public: true
-    arguments: ['']
+    arguments: ['user_storage']
   Bluesquare\CryptorBundle\Cryptor: '@bluesquare.storage'