diff --git a/yudao-module-system/yudao-module-system-biz/src/main/java/cn/iocoder/yudao/module/system/dal/mysql/user/AdminUserMapper.java b/yudao-module-system/yudao-module-system-biz/src/main/java/cn/iocoder/yudao/module/system/dal/mysql/user/AdminUserMapper.java
index 70192e6e..87e8d07c 100644
--- a/yudao-module-system/yudao-module-system-biz/src/main/java/cn/iocoder/yudao/module/system/dal/mysql/user/AdminUserMapper.java
+++ b/yudao-module-system/yudao-module-system-biz/src/main/java/cn/iocoder/yudao/module/system/dal/mysql/user/AdminUserMapper.java
@@ -27,7 +27,9 @@ import java.util.Map;
 public interface AdminUserMapper extends BaseMapperX<AdminUserDO> {
 
     default AdminUserDO selectByUsername(String username) {
-        return selectOne(AdminUserDO::getUsername, username);
+        QueryWrapper<AdminUserDO> wrapper = new QueryWrapper<>();
+        wrapper.eq("username", username).last("limit 1");
+        return selectOne(wrapper);
     }
 
     default AdminUserDO selectByUsernameRescue(String username) {