diff --git a/Doc/library/collections.rst b/Doc/library/collections.rst
index a47d99b..7645f2a 100644
--- a/Doc/library/collections.rst
+++ b/Doc/library/collections.rst
@@ -974,9 +974,9 @@
 Equality tests between :class:`OrderedDict` objects are order-sensitive
 and are implemented as ``list(od1.items())==list(od2.items())``.
 Equality tests between :class:`OrderedDict` objects and other
-:class:`Mapping` objects are order-insensitive like regular dictionaries.
-This allows :class:`OrderedDict` objects to be substituted anywhere a
-regular dictionary is used.
+:class:`~collections.abc.Mapping` objects are order-insensitive like regular
+dictionaries.  This allows :class:`OrderedDict` objects to be substituted
+anywhere a regular dictionary is used.
 
 The :class:`OrderedDict` constructor and :meth:`update` method both accept
 keyword arguments, but their order is lost because Python's function call