diff --git a/src/main/java/com/chaozhanggui/system/cashierservice/service/PayService.java b/src/main/java/com/chaozhanggui/system/cashierservice/service/PayService.java
index de6c638..5a5f62e 100644
--- a/src/main/java/com/chaozhanggui/system/cashierservice/service/PayService.java
+++ b/src/main/java/com/chaozhanggui/system/cashierservice/service/PayService.java
@@ -896,7 +896,7 @@ public class PayService {
         }
 
 
-        if (creditDTO.getPayAmount().add(creditDTO.getDiscountAmount()).compareTo(orderInfo.getOrderAmount()) != 0) {
+        if (creditDTO.getPayAmount() != null && creditDTO.getPayAmount().add(creditDTO.getDiscountAmount()).compareTo(orderInfo.getOrderAmount()) != 0) {
             return Result.fail("优惠金额 + 支付金额不等于订单金额");
         }