diff --git a/src/server/game/mod/playroom/playroom.go b/src/server/game/mod/playroom/playroom.go
index 3328d04f..d63c4bfa 100644
--- a/src/server/game/mod/playroom/playroom.go
+++ b/src/server/game/mod/playroom/playroom.go
@@ -944,6 +944,7 @@ func (p *PlayroomMod) ShopBuy(Id, Num int, WeeklyDiscount bool) ([]*item.Item, [
 		if LimitNum < Limit {
 			NewCostItem = int(math.Ceil(float64(NewCostItem) * float64(Discount) / 100))
 		}
+		p.WeeklyDiscount[Id] = LimitNum + Num
 	}
 	CostItem[0].Num = NewCostItem
 	return []*item.Item{item.NewItem(AddItemId, Num)}, CostItem, nil