diff -Naur mock-0.8.15/py/mock.py mock-0.8.15-new/py/mock.py
--- mock-0.8.15/py/mock.py	2007-12-06 03:09:01.000000000 -0200
+++ mock-0.8.15-new/py/mock.py	2007-12-08 22:45:46.000000000 -0200
@@ -234,7 +234,7 @@
         options.rpmmacros.append("_with_%s 1" % option)
 
     for option in options.rpmwithout:
-        options.rpmmacros.append("_with_%s 0" % option)
+        options.rpmmacros.append("_without_%s 1" % option)
 
     for macro in options.rpmmacros:
         try: