--- a/mercurial/dagutil.py	Thu Jun 16 19:34:42 2011 +0200
+++ b/mercurial/dagutil.py	Wed Jun 15 17:04:06 2011 -0300
@@ -7,6 +7,7 @@
 # GNU General Public License version 2 or any later version.
 
 from node import nullrev
+from i18n import _
 
 
 class basedag(object):