1 files changed, 4 insertions, 1 deletions
diff --git a/synapse/replication/http/_base.py b/synapse/replication/http/_base.py
index ece03467b5..5685cf2121 100644
--- a/synapse/replication/http/_base.py
+++ b/synapse/replication/http/_base.py
@@ -158,7 +158,10 @@ class ReplicationEndpoint(metaclass=abc.ABCMeta):
     def make_client(cls, hs):
         """Create a client that makes requests.
 
-        Returns a callable that accepts the same parameters as `_serialize_payload`.
+        Returns a callable that accepts the same parameters as
+        `_serialize_payload`, and also accepts an optional `instance_name`
+        parameter to specify which instance to hit (the instance must be in
+        the `instance_map` config).
         """
         clock = hs.get_clock()
         client = hs.get_simple_http_client()