Add missing source links.
diff --git a/Doc/library/xmlrpc.client.rst b/Doc/library/xmlrpc.client.rst
index d25cbaf..a62021d 100644
--- a/Doc/library/xmlrpc.client.rst
+++ b/Doc/library/xmlrpc.client.rst
@@ -10,6 +10,10 @@
.. XXX Not everything is documented yet. It might be good to describe
Marshaller, Unmarshaller, getparser, dumps, loads, and Transport.
+**Source code:** :source:`Lib/xmlrpc/client.py`
+
+--------------
+
XML-RPC is a Remote Procedure Call method that uses XML passed via HTTP as a
transport. With it, a client can call methods with parameters on a remote
server (the server is named by a URI) and get back structured data. This module