diff --git a/configuration/multiple_kernels.rst b/configuration/multiple_kernels.rst
index 5121aed9bb3..e73c7e4ebef 100644
--- a/configuration/multiple_kernels.rst
+++ b/configuration/multiple_kernels.rst
@@ -117,6 +117,9 @@ resources::
     // src/Kernel.php
     namespace Shared;
 
+    // ...
+    use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
+    use Symfony\Component\Routing\Loader\Configurator\RoutingConfigurator;
     // ...
 
     class Kernel extends BaseKernel