--- a/mercurial/graphmod.py	Sat Aug 08 19:17:40 2015 -0700
+++ b/mercurial/graphmod.py	Sat Aug 08 19:18:23 2015 -0700
@@ -17,11 +17,13 @@
 Data depends on type.
 """
 
-from mercurial.node import nullrev
-import util
+from __future__ import absolute_import
 
 import heapq
 
+from .node import nullrev
+from . import util
+
 CHANGESET = 'C'
 
 def groupbranchiter(revs, parentsfunc, firstbranch=()):