1 files changed, 1 insertions, 4 deletions
diff --git a/synapse/handlers/room_summary.py b/synapse/handlers/room_summary.py
index 1dd74912fa..75aee6a111 100644
--- a/synapse/handlers/room_summary.py
+++ b/synapse/handlers/room_summary.py
@@ -662,7 +662,7 @@ class RoomSummaryHandler:
         # The API doesn't return the room version so assume that a
         # join rule of knock is valid.
         if (
-            room.get("join_rules")
+            room.get("join_rule")
             in (JoinRules.PUBLIC, JoinRules.KNOCK, JoinRules.KNOCK_RESTRICTED)
             or room.get("world_readable") is True
         ):
@@ -714,9 +714,6 @@ class RoomSummaryHandler:
             "canonical_alias": stats["canonical_alias"],
             "num_joined_members": stats["joined_members"],
             "avatar_url": stats["avatar"],
-            # plural join_rules is a documentation error but kept for historical
-            # purposes. Should match /publicRooms.
-            "join_rules": stats["join_rules"],
             "join_rule": stats["join_rules"],
             "world_readable": (
                 stats["history_visibility"] == HistoryVisibility.WORLD_READABLE