1 files changed, 2 insertions, 4 deletions
diff --git a/synapse/handlers/relations.py b/synapse/handlers/relations.py
index 73217d135d..b9497ff3f3 100644
--- a/synapse/handlers/relations.py
+++ b/synapse/handlers/relations.py
@@ -193,10 +193,8 @@ class RelationsHandler:
         annotations = await self._main_store.get_aggregation_groups_for_event(
             event_id, room_id
         )
-        if annotations.chunk:
-            aggregations.annotations = await annotations.to_dict(
-                cast("DataStore", self)
-            )
+        if annotations:
+            aggregations.annotations = {"chunk": annotations}
 
         references = await self._main_store.get_relations_for_event(
             event_id, event, room_id, RelationTypes.REFERENCE, direction="f"