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path: root/synapse/rest/media/v1/media_storage.py
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-rw-r--r--synapse/rest/media/v1/media_storage.py4
1 files changed, 3 insertions, 1 deletions
diff --git a/synapse/rest/media/v1/media_storage.py b/synapse/rest/media/v1/media_storage.py
index 7f263db239..d23fe10b07 100644
--- a/synapse/rest/media/v1/media_storage.py
+++ b/synapse/rest/media/v1/media_storage.py
@@ -255,7 +255,9 @@ class FileResponder(Responder):
         self.open_file = open_file
 
     def write_to_consumer(self, consumer):
-        return FileSender().beginFileTransfer(self.open_file, consumer)
+        return make_deferred_yieldable(
+            FileSender().beginFileTransfer(self.open_file, consumer)
+        )
 
     def __exit__(self, exc_type, exc_val, exc_tb):
         self.open_file.close()