#9166: NotImplemented is not an exception.
diff --git a/Doc/whatsnew/2.7.rst b/Doc/whatsnew/2.7.rst
index 43a0124..cea0557 100644
--- a/Doc/whatsnew/2.7.rst
+++ b/Doc/whatsnew/2.7.rst
@@ -1072,7 +1072,7 @@
(Added by Raymond Hettinger; :issue:`1818`.)
Finally, the :class:`~collections.Mapping` abstract base class now
- raises a :exc:`NotImplemented` exception if a mapping is compared to
+ returns :const:`NotImplemented` if a mapping is compared to
another type that isn't a :class:`Mapping`.
(Fixed by Daniel Stutzbach; :issue:`8729`.)