diff --git a/webapp/controller/UserController.class.php b/webapp/controller/UserController.class.php
index a556f6db..6cdc166e 100644
--- a/webapp/controller/UserController.class.php
+++ b/webapp/controller/UserController.class.php
@@ -476,7 +476,7 @@ class UserController extends BaseAuthedController {
         $heroInfo['avatar_info'] = Hero::avatarInfo($heroDb);
         {
             $preset = HeroPreset::getHeroPreset($userDb['hero_id']);
-            $heroInfo['spec_skill'] = $preset['skill_id'];
+            $heroInfo['spec_skill'] = '' . $preset['skill_id'];
         }
         myself()->_rspData(array(
             'info' => array(
@@ -511,7 +511,7 @@ class UserController extends BaseAuthedController {
         $heroInfo['avatar_info'] = Hero::avatarInfo($heroDb);
         {
             $preset = HeroPreset::getHeroPreset($heroUniId);
-            $heroInfo['spec_skill'] = $specSkill;
+            $heroInfo['spec_skill'] = '' . $specSkill;
         }
         myself()->_rspData(array(
             'info' => array(