diff --git a/pay-java-wx/src/main/java/com/egzosn/pay/wx/v3/api/WxPayService.java b/pay-java-wx/src/main/java/com/egzosn/pay/wx/v3/api/WxPayService.java
index a932b33..505f41f 100644
--- a/pay-java-wx/src/main/java/com/egzosn/pay/wx/v3/api/WxPayService.java
+++ b/pay-java-wx/src/main/java/com/egzosn/pay/wx/v3/api/WxPayService.java
@@ -350,7 +350,7 @@ public class WxPayService extends BasePayService<WxPayConfigStorage> implements
      */
     @Override
     public HttpStringEntity hookHttpEntity(HttpStringEntity entity) {
-        if (StringUtils.isNotEmpty(payConfigStorage.getKeyPublic())) {
+        if (StringUtils.isNotEmpty(payConfigStorage.getKeyPublicId())) {
             // 商户上送敏感信息时使用`微信支付平台公钥`加密
             entity.addHeader(new BasicHeader(WxConst.WECHATPAY_SERIAL, payConfigStorage.getKeyPublicId()));
         }