diff --git a/src/core/matrix/state_res/event_auth.rs b/src/core/matrix/state_res/event_auth.rs
index 6f11722c4..b40babc36 100644
--- a/src/core/matrix/state_res/event_auth.rs
+++ b/src/core/matrix/state_res/event_auth.rs
@@ -337,8 +337,7 @@ where
 	// If the create event content has the field m.federate set to false and the
 	// sender domain of the event does not match the sender domain of the create
 	// event, reject.
-	if !(room_version.room_id_format == RoomIdFormatVersion::V2)
-		&& !room_create_content.federate
+	if !room_create_content.federate
 		&& room_create_event.sender().server_name() != incoming_event.sender().server_name()
 	{
 		warn!(