--- urllib.py.orig	2012-01-19 11:24:45.000000000 +0100
+++ urllib.py	2012-03-15 23:42:48.000000000 +0100
@@ -1395,7 +1395,7 @@
 
                 else:
                     mask = int(mask[1:])
-                    mask = 32 - mask
+                mask = 32 - mask
 
                 if (hostIP >> mask) == (base >> mask):
                     return True