1 files changed, 3 insertions, 0 deletions
diff --git a/synapse/http/site.py b/synapse/http/site.py
index 55a6afce35..3dbd541fed 100644
--- a/synapse/http/site.py
+++ b/synapse/http/site.py
@@ -82,6 +82,7 @@ class SynapseRequest(Request):
         self.reactor = site.reactor
         self._channel = channel  # this is used by the tests
         self.start_time = 0.0
+        self.experimental_cors_msc3886 = site.experimental_cors_msc3886
 
         # The requester, if authenticated. For federation requests this is the
         # server name, for client requests this is the Requester object.
@@ -622,6 +623,8 @@ class SynapseSite(Site):
 
         request_id_header = config.http_options.request_id_header
 
+        self.experimental_cors_msc3886 = config.http_options.experimental_cors_msc3886
+
         def request_factory(channel: HTTPChannel, queued: bool) -> Request:
             return request_class(
                 channel,