diff --git a/third_party/2and3/werkzeug/exceptions.pyi b/third_party/2and3/werkzeug/exceptions.pyi
index 4363e08a7..368604641 100644
--- a/third_party/2and3/werkzeug/exceptions.pyi
+++ b/third_party/2and3/werkzeug/exceptions.pyi
@@ -157,3 +157,5 @@ class Aborter:
     def __call__(self, code: Union[int, Response], *args: Any, **kwargs: Any) -> NoReturn: ...
 
 def abort(status: Union[int, Response], *args: Any, **kwargs: Any) -> NoReturn: ...
+
+class BadRequestKeyError(BadRequest, KeyError): ...