diff --git a/pisi/graph.py b/pisi/graph.py
index 5f78f9d5..d11a0dc6 100644
--- a/pisi/graph.py
+++ b/pisi/graph.py
@@ -46,7 +46,7 @@ class Digraph(object):
         "return a list of edge descriptors"
         list = []
         for u in self.__v:
-            for v in self.__u:
+            for v in self.__adj[u]:
                 list.append( (u,v) )
         return list