diff --git a/unify/pay_type.go b/unify/pay_type.go
index a99e77f..ef6d009 100644
--- a/unify/pay_type.go
+++ b/unify/pay_type.go
@@ -59,6 +59,7 @@ type TransferReq struct {
 	PayTitle   string `json:"payTitle"`
 	PayChannel string `json:"payChannel"`
 	UserId     string `json:"userId"`
+	OutTradeNo string `json:"outTradeNo"`
 }
 
 type CommonResponse struct {