--- a/mercurial/commands.py	Mon Mar 13 17:49:13 2017 -0700
+++ b/mercurial/commands.py	Thu Mar 16 10:10:00 2017 +0530
@@ -4720,6 +4720,7 @@
     Returns 0 on success.
     """
 
+    opts = pycompat.byteskwargs(opts)
     revs = opts.get('rev')
     change = opts.get('change')