diff --git a/webapp/services/StakingVipService.php b/webapp/services/StakingVipService.php
index 56915cf2..68dbf11a 100644
--- a/webapp/services/StakingVipService.php
+++ b/webapp/services/StakingVipService.php
@@ -20,7 +20,7 @@ class StakingVipService extends BaseService
             myself()->_getMarketMysql(),
             't_vip_user',
             array(
-                'account_address' => $accountAddr,
+                'account_address' => strtolower($accountAddr),
             )
         );