diff --git a/rss/handler/rss.go b/rss/handler/rss.go
index b612af9..4a60ee4 100644
--- a/rss/handler/rss.go
+++ b/rss/handler/rss.go
@@ -148,6 +148,7 @@ func (e *Rss) Feed(ctx context.Context, req *pb.FeedRequest, rsp *pb.FeedRespons
 
 	// default query all
 	q := model.QueryAll()
+	q.Index.FieldName = "date"
 	q.Order = model.Order{
 		Type: model.OrderTypeDesc,
 		FieldName: "date",