builtin -> built-in.
diff --git a/Doc/library/xmlrpclib.rst b/Doc/library/xmlrpclib.rst
index 647cda9..ee99950 100644
--- a/Doc/library/xmlrpclib.rst
+++ b/Doc/library/xmlrpclib.rst
@@ -94,7 +94,7 @@
:exc:`ProtocolError` used to signal an error in the HTTP/HTTPS transport layer.
Both :exc:`Fault` and :exc:`ProtocolError` derive from a base class called
:exc:`Error`. Note that even though starting with Python 2.2 you can subclass
- builtin types, the xmlrpclib module currently does not marshal instances of such
+ built-in types, the xmlrpclib module currently does not marshal instances of such
subclasses.
When passing strings, characters special to XML such as ``<``, ``>``, and ``&``