diff --git a/src/main/resources/sql/mapper/base/user-mapper.xml b/src/main/resources/sql/mapper/base/user-mapper.xml
index 4dec4ce5..5b7540b1 100644
--- a/src/main/resources/sql/mapper/base/user-mapper.xml
+++ b/src/main/resources/sql/mapper/base/user-mapper.xml
@@ -103,7 +103,7 @@ SELECT *
    AND NSTT_CD = #{institute}</select>
 
 <insert id="insertUser" parameterType="cokr.xit.base.user.ManagedUser">
-<selectKey resultType="string" keyProperty="id" keyColumn="NEW_ID" order="BEFORE">SELECT LPAD(IFNULL(MAX(USER_ID) + 1, 1), 10, '0') NEW_ID FROM TB_USER</selectKey>
+<selectKey resultType="string" keyProperty="id" keyColumn="NEW_ID" order="BEFORE">SELECT LPAD(NVL(MAX(USER_ID) + 1, 1), 10, '0') NEW_ID FROM TB_USER</selectKey>
 /* 사용자 정보 등록(userMapper.insertUser) */
 INSERT INTO TB_USER (
        USER_ID