diff --git a/routing.rst b/routing.rst
index 6355bb3dd63..2c8a6b0bdb6 100644
--- a/routing.rst
+++ b/routing.rst
@@ -566,7 +566,7 @@ placeholder:
         use App\Controller\BlogController;
 
         return function (RoutingConfigurator $routes) {
-            $routes->add('blog_list', '/blog/{page<\d+>?1')
+            $routes->add('blog_list', '/blog/{page<\d+>?1}')
                 ->controller([BlogController::class, 'list'])
             ;
         };