diff --git a/changelog.d/19718.misc b/changelog.d/19718.misc
index b7fa1e9730..5914943f34 100644
--- a/changelog.d/19718.misc
+++ b/changelog.d/19718.misc
@@ -1 +1 @@
-Add storage functions for future MSC4242 work.
+Add storage functions for future [MSC4242](https://github.com/matrix-org/matrix-spec-proposals/pull/4242) work.
diff --git a/synapse/storage/databases/main/event_federation.py b/synapse/storage/databases/main/event_federation.py
index bf08824eb4..4d3a77c74a 100644
--- a/synapse/storage/databases/main/event_federation.py
+++ b/synapse/storage/databases/main/event_federation.py
@@ -1252,6 +1252,7 @@ class EventFederationWorkerStore(
     # Remove comment when used.
     async def get_missing_events_state_dag(
         self,
+        *,
         room_id: str,
         earliest_events: list[str],
         latest_events: list[str],
@@ -1267,8 +1268,8 @@ class EventFederationWorkerStore(
         )
         return await self.get_events_as_list(ids)
 
-    # 22/04/2026: Unused currently, but will be used in future MSC4242 PRs.
-    # Remove comment when used.
+    # FIXME(2026-04-22): Remove comment when used. Unused currently, but will be used in
+    # future MSC4242 PRs.
     def _get_missing_events_state_dag_txn(
         self,
         txn: LoggingTransaction,