2 files changed, 2 insertions, 4 deletions
diff --git a/synapse/http/server.py b/synapse/http/server.py
index 0d0c610b28..211795dc39 100644
--- a/synapse/http/server.py
+++ b/synapse/http/server.py
@@ -74,7 +74,6 @@ from synapse.api.errors import (
 from synapse.config.homeserver import HomeServerConfig
 from synapse.logging.context import defer_to_thread, preserve_fn, run_in_background
 from synapse.logging.opentracing import active_span, start_active_span, trace_servlet
-from synapse.types import ISynapseReactor
 from synapse.util import json_encoder
 from synapse.util.caches import intern_dict
 from synapse.util.cancellation import is_function_cancellable
@@ -869,8 +868,7 @@ async def _async_write_json_to_request_in_thread(
 
     with start_active_span("encode_json_response"):
         span = active_span()
-        reactor: ISynapseReactor = request.reactor  # type: ignore
-        json_str = await defer_to_thread(reactor, encode, span)
+        json_str = await defer_to_thread(request.reactor, encode, span)
 
     _write_bytes_to_request(request, json_str)
 
diff --git a/synapse/http/site.py b/synapse/http/site.py
index af169ba51e..8bf63edd36 100644
--- a/synapse/http/site.py
+++ b/synapse/http/site.py
@@ -658,7 +658,7 @@ class SynapseSite(ProxySite):
         )
 
         self.site_tag = site_tag
-        self.reactor = reactor
+        self.reactor: ISynapseReactor = reactor
 
         assert config.http_options is not None
         proxied = config.http_options.x_forwarded