diff -r c2e284cee333 -r eef9a2d67051 hgext/fastannotate/protocol.py
--- a/hgext/fastannotate/protocol.py	Sun Oct 06 13:17:19 2019 -0400
+++ b/hgext/fastannotate/protocol.py	Sun Oct 06 13:28:56 2019 -0400
@@ -10,6 +10,7 @@
 import os
 
 from mercurial.i18n import _
+from mercurial.pycompat import open
 from mercurial import (
     error,
     extensions,