--- a/mercurial/node.py
+++ b/mercurial/node.py
@@ -7,7 +7,8 @@ This software may be used and distribute
of the GNU General Public License, incorporated herein by reference.
"""
-import binascii
+from demandload import demandload
+demandload(globals(), "binascii")
nullid = "\0" * 20