diff --git a/bundles/configuration.rst b/bundles/configuration.rst
index 5df1177d910..50b68705698 100644
--- a/bundles/configuration.rst
+++ b/bundles/configuration.rst
@@ -334,6 +334,8 @@ add this logic to the bundle class directly::
     namespace Acme\SocialBundle;
 
     use Symfony\Component\Config\Definition\Configurator\DefinitionConfigurator;
+    use Symfony\Component\DependencyInjection\ContainerBuilder;
+    use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
     use Symfony\Component\HttpKernel\Bundle\AbstractBundle;
 
     class AcmeSocialBundle extends AbstractBundle