1 files changed, 4 insertions, 0 deletions
diff --git a/synapse/http/server.py b/synapse/http/server.py
index 9314454af1..7b760505b2 100644
--- a/synapse/http/server.py
+++ b/synapse/http/server.py
@@ -892,6 +892,10 @@ def set_cors_headers(request: SynapseRequest) -> None:
             b"Access-Control-Allow-Headers",
             b"X-Requested-With, Content-Type, Authorization, Date",
         )
+        request.setHeader(
+            b"Access-Control-Expose-Headers",
+            b"Synapse-Trace-Id",
+        )
 
 
 def set_corp_headers(request: Request) -> None: