diff -Nur m2crypto-0.16.orig/setup.py m2crypto-0.16/setup.py
--- m2crypto-0.16.orig/setup.py	2006-05-03 22:51:07.000000000 +0100
+++ m2crypto-0.16/setup.py	2006-08-10 15:38:30.000000000 +0100
@@ -48,7 +48,7 @@
 
     # This copy of swig_sources is from Python 2.2.
 
-    def swig_sources (self, sources):
+    def swig_sources (self, sources, extension = None):
 
         """Walk the list of source files in 'sources', looking for SWIG
         interface (.i) files.  Run SWIG on all that are found, and