Fix using TLS for replication (#15746)

Fixes #15744.

1 files changed, 1 insertions, 1 deletions

diff --git a/synapse/http/replicationagent.py b/synapse/http/replicationagent.py

index 800f21873d..d6ba6f0e57 100644
--- a/synapse/http/replicationagent.py
+++ b/synapse/http/replicationagent.py
@@ -76,7 +76,7 @@ class ReplicationEndpointFactory:
                 endpoint = wrapClientTLS(
                     # The 'port' argument below isn't actually used by the function
                     self.context_factory.creatorForNetloc(
-                        self.instance_map[worker_name].host,
+                        self.instance_map[worker_name].host.encode("utf-8"),
                         self.instance_map[worker_name].port,
                     ),
                     endpoint,