diff --git a/pisi/config.py b/pisi/config.py
index a0b57276..ee8a8d5c 100644
--- a/pisi/config.py
+++ b/pisi/config.py
@@ -67,7 +67,7 @@ class Config(object):
         return getattr(self.__configinstance, attr)
 
     def __setattr__(self, attr, value):
-        return setattr(self.__configinstance, attr, value)
+        setattr(self.__configinstance, attr, value)
 
 
 config = Config()