diff -r c3a09c535001 Lib/xml/parsers/expat.py
--- a/Lib/xml/parsers/expat.py	Sat Feb 23 08:40:39 2013 +0200
+++ b/Lib/xml/parsers/expat.py	Sat Feb 23 18:08:59 2013 +0100
@@ -6,3 +6,6 @@
 # provide pyexpat submodules as xml.parsers.expat submodules
 sys.modules['xml.parsers.expat.model'] = model
 sys.modules['xml.parsers.expat.errors'] = errors
+
+sys.modules['xml.parsers.expat.model'].__loader__ = None
+sys.modules['xml.parsers.expat.errors'].__loader__ = None