diff --git a/webapp/controller/HeroController.class.php b/webapp/controller/HeroController.class.php
index 5e391028..cc6d9491 100644
--- a/webapp/controller/HeroController.class.php
+++ b/webapp/controller/HeroController.class.php
@@ -394,6 +394,22 @@ class HeroController extends BaseAuthedController {
                 return;
             }
         }
+        {
+            $idx = 0;
+            $found = false;
+            for ($i = 0; $i < kMaxHeroUpQualityNum; ++$i) {
+                $upHeroUniId = $this->_getV(TN_HERO_QUALITY_UP, $i);
+                if ($upHeroUniId == $heroUniId) {
+                    $idx = $i;
+                    $found = true;
+                    break;
+                }
+            }
+            if (!$found) {
+                $this->_rspErr(1, 'hero already upgrade');
+                return;
+            }
+        }
         if (!$heroDb) {
             $this->_rspErr(1, 'hero does not exist');
             return;