1 files changed, 3 insertions, 3 deletions
diff --git a/synapse/rest/media/v1/media_storage.py b/synapse/rest/media/v1/media_storage.py
index fca239d8c7..9f6c251caf 100644
--- a/synapse/rest/media/v1/media_storage.py
+++ b/synapse/rest/media/v1/media_storage.py
@@ -343,7 +343,7 @@ class SpamMediaException(NotFoundError):
     """
 
 
-@attr.s(slots=True)
+@attr.s(slots=True, auto_attribs=True)
 class ReadableFileWrapper:
     """Wrapper that allows reading a file in chunks, yielding to the reactor,
     and writing to a callback.
@@ -354,8 +354,8 @@ class ReadableFileWrapper:
 
     CHUNK_SIZE = 2 ** 14
 
-    clock = attr.ib(type=Clock)
-    path = attr.ib(type=str)
+    clock: Clock
+    path: str
 
     async def write_chunks_to(self, callback: Callable[[bytes], None]) -> None:
         """Reads the file in chunks and calls the callback with each chunk."""