1 files changed, 2 insertions, 2 deletions
diff --git a/synapse/storage/search.py b/synapse/storage/search.py
index a9c299a861..f0fa5d7631 100644
--- a/synapse/storage/search.py
+++ b/synapse/storage/search.py
@@ -448,7 +448,7 @@ class SearchStore(BackgroundUpdateStore):
             "search_msgs", self.cursor_to_dict, sql, *args
         )
 
-        results = filter(lambda row: row["room_id"] in room_ids, results)
+        results = list(filter(lambda row: row["room_id"] in room_ids, results))
 
         events = yield self._get_events([r["event_id"] for r in results])
 
@@ -603,7 +603,7 @@ class SearchStore(BackgroundUpdateStore):
             "search_rooms", self.cursor_to_dict, sql, *args
         )
 
-        results = filter(lambda row: row["room_id"] in room_ids, results)
+        results = list(filter(lambda row: row["room_id"] in room_ids, results))
 
         events = yield self._get_events([r["event_id"] for r in results])