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