diff --git a/erp/payment/prepaid.go b/erp/payment/prepaid.go
index 8adfa07..ef959b3 100644
--- a/erp/payment/prepaid.go
+++ b/erp/payment/prepaid.go
@@ -31,7 +31,7 @@ func (c *prepaid) All(ctx context.Context, paymentId int64) (reply []PrepaidItem
 }
 
 type ArgsPrepaidAdd struct {
-	PurchaseId int64 // 采购合同ID
+	PaymentId int64 // 付款单ID
 	PrepaidAdd
 }