1 files changed, 1 insertions, 3 deletions
diff --git a/synapse/storage/databases/main/appservice.py b/synapse/storage/databases/main/appservice.py
index 9f182c2a89..e2d1b758bd 100644
--- a/synapse/storage/databases/main/appservice.py
+++ b/synapse/storage/databases/main/appservice.py
@@ -48,9 +48,7 @@ def _make_exclusive_regex(
     ]
     if exclusive_user_regexes:
         exclusive_user_regex = "|".join("(" + r + ")" for r in exclusive_user_regexes)
-        exclusive_user_pattern = re.compile(
-            exclusive_user_regex
-        )  # type: Optional[Pattern]
+        exclusive_user_pattern: Optional[Pattern] = re.compile(exclusive_user_regex)
     else:
         # We handle this case specially otherwise the constructed regex
         # will always match