Add :term:s for "new-style class".
diff --git a/Doc/library/xmlrpclib.rst b/Doc/library/xmlrpclib.rst
index b3efb5c..1faa891 100644
--- a/Doc/library/xmlrpclib.rst
+++ b/Doc/library/xmlrpclib.rst
@@ -113,8 +113,9 @@
The *use_datetime* flag was added.
.. versionchanged:: 2.6
- Instances of new-style classes can be passed in if they have an *__dict__*
- attribute and don't have a base class that is marshalled in a special way.
+ Instances of :term:`new-style class`\es can be passed in if they have an
+ *__dict__* attribute and don't have a base class that is marshalled in a
+ special way.
.. seealso::