1 files changed, 2 insertions, 1 deletions
diff --git a/synapse/rest/media/v1/media_repository.py b/synapse/rest/media/v1/media_repository.py
index 0641924f18..8b4841ed5d 100644
--- a/synapse/rest/media/v1/media_repository.py
+++ b/synapse/rest/media/v1/media_repository.py
@@ -35,6 +35,7 @@ from synapse.api.errors import (
 from synapse.config._base import ConfigError
 from synapse.logging.context import defer_to_thread
 from synapse.metrics.background_process_metrics import run_as_background_process
+from synapse.types import UserID
 from synapse.util.async_helpers import Linearizer
 from synapse.util.retryutils import NotRetryingDestination
 from synapse.util.stringutils import random_string
@@ -145,7 +146,7 @@ class MediaRepository:
         upload_name: Optional[str],
         content: IO,
         content_length: int,
-        auth_user: str,
+        auth_user: UserID,
     ) -> str:
         """Store uploaded content for a local user and return the mxc URL