diff --git a/flask/wrappers.py b/flask/wrappers.py
index abcf90f8..759e9905 100644
--- a/flask/wrappers.py
+++ b/flask/wrappers.py
@@ -175,7 +175,7 @@ class Request(RequestBase):
 
         .. versionadded:: 0.8
         """
-        raise BadRequest()
+        raise BadRequest(e)
 
     def _load_form_data(self):
         RequestBase._load_form_data(self)