diff --git a/flask/app.py b/flask/app.py
index f8526d5c..08fc3248 100644
--- a/flask/app.py
+++ b/flask/app.py
@@ -1265,7 +1265,7 @@ class Flask(_PackageBoundObject):
 
     def handle_exception(self, e):
         """Default exception handling that kicks in when an exception
-        occours that is not caught.  In debug mode the exception will
+        occurs that is not caught.  In debug mode the exception will
         be re-raised immediately, otherwise it is logged and the handler
         for a 500 internal server error is used.  If no such handler
         exists, a default 500 internal server error message is displayed.