diff --git a/hgext/remotefilelog/remotefilelogserver.py b/hgext/remotefilelog/remotefilelogserver.py
--- a/hgext/remotefilelog/remotefilelogserver.py
+++ b/hgext/remotefilelog/remotefilelogserver.py
@@ -129,7 +129,7 @@
     wireprotov1server.commands['stream_out_shallow'] = (stream_out_shallow, '*')
 
     # don't clone filelogs to shallow clients
-    def _walkstreamfiles(orig, repo):
+    def _walkstreamfiles(orig, repo, matcher=None):
         if state.shallowremote:
             # if we are shallow ourselves, stream our local commits
             if shallowutil.isenabled(repo):