1 files changed, 1 insertions, 1 deletions
diff --git a/synapse/util/macaroons.py b/synapse/util/macaroons.py
index f6ebfd7e7d..d1f76e3dc5 100644
--- a/synapse/util/macaroons.py
+++ b/synapse/util/macaroons.py
@@ -39,7 +39,7 @@ def get_value_from_macaroon(macaroon: pymacaroons.Macaroon, key: str) -> str:
              caveat in the macaroon, or if the caveat was not found in the macaroon.
     """
     prefix = key + " = "
-    result = None  # type: Optional[str]
+    result: Optional[str] = None
     for caveat in macaroon.caveats:
         if not caveat.caveat_id.startswith(prefix):
             continue