diff -r dbf868623daf -r ad5f2b923b0d mercurial/bundle2.py
--- a/mercurial/bundle2.py	Sun Oct 15 15:01:03 2017 +0200
+++ b/mercurial/bundle2.py	Mon Nov 13 04:22:45 2017 +0100
@@ -1475,6 +1475,7 @@
 # These are only the static capabilities.
 # Check the 'getrepocaps' function for the rest.
 capabilities = {'HG20': (),
+                'bookmarks': (),
                 'error': ('abort', 'unsupportedcontent', 'pushraced',
                           'pushkey'),
                 'listkeys': (),