mercurial/wireprotov2server.py

--- a/mercurial/wireprotov2server.py	Mon Apr 16 22:00:52 2018 -0700
+++ b/mercurial/wireprotov2server.py	Mon Apr 16 22:08:13 2018 -0700
@@ -393,7 +393,7 @@
     transports.
     """
     compression = []
-    for engine in wireproto.supportedcompengines(repo.ui, util.SERVERROLE):
+    for engine in wireprototypes.supportedcompengines(repo.ui, util.SERVERROLE):
         compression.append({
             b'name': engine.wireprotosupport().name,
         })