diff --git a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/service/impl/PayScoreServiceImpl.java b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/service/impl/PayScoreServiceImpl.java
index 249cfa3f5..ee92c6611 100644
--- a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/service/impl/PayScoreServiceImpl.java
+++ b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/service/impl/PayScoreServiceImpl.java
@@ -230,7 +230,7 @@ public WxPayScoreResult modifyServiceOrder(WxPayScoreRequest request) throws WxP
     if(Strings.isNullOrEmpty(request.getAppid())){
       request.setAppid(config.getAppId());
     }
-    if(Strings.isNullOrEmpty(config.getServiceId())){
+    if(Strings.isNullOrEmpty(request.getServiceId())){
       request.setServiceId(config.getServiceId());
     }
     request.setOutOrderNo(null);