diff --git a/Doc/library/userdict.rst b/Doc/library/userdict.rst
index 0585bda..15801e8 100644
--- a/Doc/library/userdict.rst
+++ b/Doc/library/userdict.rst
@@ -74,6 +74,9 @@ provide the following attribute:
    Starting with Python version 2.6, it is recommended to use
    :class:`collections.MutableMapping` instead of :class:`DictMixin`.
 
+   Note that DictMixin does not implement the :meth:`~dict.viewkeys`,
+   :meth:`~dict.viewvalues` and :meth:`~dict.viewitems` methods.
+
 :mod:`UserList` --- Class wrapper for list objects
 ==================================================
 
@@ -214,4 +217,3 @@ provide the following attribute:
 
    A real Python string or Unicode object used to store the content of the
    :class:`UserString` class.
-