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-rw-r--r--synapse/rest/media/v1/preview_url_resource.py1
1 files changed, 1 insertions, 0 deletions
diff --git a/synapse/rest/media/v1/preview_url_resource.py b/synapse/rest/media/v1/preview_url_resource.py
index 0337b64dc2..053346fb86 100644
--- a/synapse/rest/media/v1/preview_url_resource.py
+++ b/synapse/rest/media/v1/preview_url_resource.py
@@ -95,6 +95,7 @@ class PreviewUrlResource(DirectServeResource):
         )
 
     def render_OPTIONS(self, request):
+        request.setHeader(b"Allow", b"OPTIONS, GET")
         return respond_with_json(request, 200, {}, send_cors=True)
 
     @wrap_json_request_handler