diff -r f62873dba3fd -r 2090044a288d mercurial/bundle2.py
--- a/mercurial/bundle2.py	Wed Feb 21 19:26:41 2018 +0100
+++ b/mercurial/bundle2.py	Thu Jan 18 15:10:22 2018 +0100
@@ -1492,6 +1492,7 @@
                 'digests': tuple(sorted(util.DIGESTS.keys())),
                 'remote-changegroup': ('http', 'https'),
                 'hgtagsfnodes': (),
+                'rev-branch-cache': (),
                 'phases': ('heads',),
                 'stream': ('v2',),
                }