--- a/pvl/verkko/rrd.py	Sun Feb 10 12:07:28 2013 +0200
+++ b/pvl/verkko/rrd.py	Sun Feb 10 12:09:33 2013 +0200
@@ -30,7 +30,7 @@
         else :
             path = ''
 
-        response.NotFound.__init__(self, path)
+        pvl.web.response.NotFound.__init__(self, path)
 
 # View/Controller
 class Handler (web.Handler) :