--- a/hgext/narrow/__init__.py	Thu Aug 22 16:47:31 2019 -0700
+++ b/hgext/narrow/__init__.py	Sun Aug 18 00:45:33 2019 +0300
@@ -17,6 +17,9 @@
 from mercurial import (
     localrepo,
     registrar,
+)
+
+from mercurial.interfaces import (
     repository,
 )