diff --git a/contrib/hbisect.py b/contrib/hbisect.py
--- a/contrib/hbisect.py
+++ b/contrib/hbisect.py
@@ -1,5 +1,8 @@
 # bisect extension for mercurial
 #
+# Copyright 2005, 2006 Benoit Boissinot <benoit.boissinot@ens-lyon.org>
+# Inspired by git bisect, extension skeleton taken from mq.py.
+#
 # This software may be used and distributed according to the terms
 # of the GNU General Public License, incorporated herein by reference.