diff --git a/webapp/controller/RechargeController.class.php b/webapp/controller/RechargeController.class.php
index ab2089d..59a78b8 100644
--- a/webapp/controller/RechargeController.class.php
+++ b/webapp/controller/RechargeController.class.php
@@ -374,7 +374,7 @@ class RechargeController
         }
 
         $ret = $conn->execScript(
-            'UPDATE recharge SET adfree=adfree-1 WHERE accountid=:accountid;',
+            'UPDATE recharge SET adfree=adfree-1, modify_time=:modify_time WHERE accountid=:accountid;',
             array(
                 ':accountid' => $account_id,
                 ':modify_time' => time(),