diff --git a/core/modules/user/user.routing.yml b/core/modules/user/user.routing.yml
index b30f281..1072175 100644
--- a/core/modules/user/user.routing.yml
+++ b/core/modules/user/user.routing.yml
@@ -97,4 +97,5 @@ user_view_page:
   defaults:
     _controller: '\Drupal\user\Controller\UserController::viewPage'
   requirements:
+    account: \d
     _entity_access: 'account.view'