diff --git a/worldsrv/shopmgr.go b/worldsrv/shopmgr.go
index 51c26d6..293d92b 100644
--- a/worldsrv/shopmgr.go
+++ b/worldsrv/shopmgr.go
@@ -1095,8 +1095,8 @@ func (this *ShopMgr) Exchange(param *ExchangeParam) {
 		}
 
 		BagMgrSingleton.AddItemsOffline(&model.AddItemParam{
-			Platform: p.Platform,
-			SnId:     p.SnId,
+			Platform: param.Platform,
+			SnId:     param.SnId,
 			Change:   itemInfo2,
 			GainWay:  common.GainWay_Exchange,
 			Operator: "system",