diff --git a/src/main/resources/au/com/royalpay/payment/manage/mappers/ofei/TopUpOrderMapper.xml b/src/main/resources/au/com/royalpay/payment/manage/mappers/ofei/TopUpOrderMapper.xml
index 24d828793..b97315ef6 100644
--- a/src/main/resources/au/com/royalpay/payment/manage/mappers/ofei/TopUpOrderMapper.xml
+++ b/src/main/resources/au/com/royalpay/payment/manage/mappers/ofei/TopUpOrderMapper.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
 <mapper namespace="au.com.royalpay.payment.manage.mappers.ofei.TopUpOrderMapper">
-    <select id="findOrderIdByStatus">
+    <select id="findOrderIdByStatus" resultType="java.lang.String">
         SELECT
         id
         FROM top_up_order