1 files changed, 1 insertions, 1 deletions
diff --git a/synapse/replication/http/register.py b/synapse/replication/http/register.py
index d005f38767..73d7477854 100644
--- a/synapse/replication/http/register.py
+++ b/synapse/replication/http/register.py
@@ -77,7 +77,7 @@ class ReplicationRegisterServlet(ReplicationEndpoint):
     async def _handle_request(self, request, user_id):
         content = parse_json_object_from_request(request)
 
-        self.registration_handler.check_registration_ratelimit(content["address"])
+        await self.registration_handler.check_registration_ratelimit(content["address"])
 
         await self.registration_handler.register_with_store(
             user_id=user_id,