diff --git a/Lib/xmllib.py b/Lib/xmllib.py
index e8210e6..445ab13 100644
--- a/Lib/xmllib.py
+++ b/Lib/xmllib.py
@@ -5,6 +5,10 @@
 import re
 import string
 
+import warnings
+warnings.warn("The xmllib module is obsolete.  Use xml.sax instead.",
+              DeprecationWarning)
+del warnings
 
 version = '0.3'