diff --git a/service_container/compiler_passes.rst b/service_container/compiler_passes.rst
index 11458a4e8e3..096c60c2642 100644
--- a/service_container/compiler_passes.rst
+++ b/service_container/compiler_passes.rst
@@ -77,10 +77,11 @@ bundle class::
     namespace App\MyBundle;
 
     use App\DependencyInjection\Compiler\CustomPass;
+    use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
     use Symfony\Component\DependencyInjection\ContainerBuilder;
     use Symfony\Component\HttpKernel\Bundle\AbstractBundle;
 
-    class MyBundle extends AbstractBundle
+    class MyBundle extends AbstractBundle implements CompilerPassInterface
     {
         public function process(ContainerBuilder $container): void
         {