diff --git a/flask/app.py b/flask/app.py
index 77852320..b103b3d9 100644
--- a/flask/app.py
+++ b/flask/app.py
@@ -1686,7 +1686,7 @@ class Flask(_PackageBoundObject):
         exception with the same traceback.
 
         .. versionchanged:: 1.0
-            Key errors raised from request data like ``form`` show the the bad
+            Key errors raised from request data like ``form`` show the bad
             key in debug mode rather than a generic bad request message.
 
         .. versionadded:: 0.7