symfony
diff --git a/‎components/http_kernel/introduction.rst
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@@ -601,6 +601,7 @@ a built-in ControllerResolver that can be used to create a working example::
     use Symfony\Component\HttpKernel\HttpKernel;
     use Symfony\Component\EventDispatcher\EventDispatcher;
     use Symfony\Component\HttpKernel\Controller\ControllerResolver;
+    use Symfony\Component\HttpKernel\EventListener\RouterListener;
     use Symfony\Component\Routing\RouteCollection;
     use Symfony\Component\Routing\Route;
     use Symfony\Component\Routing\Matcher\UrlMatcher;