diff --git a/webapp/controller/RankingController.class.php b/webapp/controller/RankingController.class.php
index e70af74b..3c479d3b 100644
--- a/webapp/controller/RankingController.class.php
+++ b/webapp/controller/RankingController.class.php
@@ -84,6 +84,7 @@ class RankingController extends BaseAuthedController {
 
     private function internalGetActivityRankData($type)
     {
+        $channel = 6516;
         $userInfo = $this->_getOrmUserInfo();
         $myRanked = array(
             'ranked' => -1,
@@ -96,21 +97,23 @@ class RankingController extends BaseAuthedController {
         if ($meta && mt\RankActivity::isActivityPeriod($meta)) {
             $row = myself()->_getSelfMysql()->execQueryOne(
                 'SELECT COUNT(*) AS row_count FROM t_rank_activity ' .
-                'WHERE type=:type AND value>:value;',
+                'WHERE type=:type AND channel=:channel AND value>:value;',
                 array(
                     ':type' => $type,
-                    ':value' => $meta['cond']
+                    ':channel' => $channel,
+                    ':value' => $meta['cond'],
                 )
             );
             if ($row['row_count'] > 0) {
                 $count = ceil($row['row_count'] / 10.0);
                 $rows = myself()->_getSelfMysql()->execQuery(
                     'SELECT * FROM t_rank_activity ' .
-                    'WHERE type=:type AND value>=:value ' .
+                    'WHERE type=:type AND channel=:channel AND value>=:value ' .
                     'ORDER BY value DESC, modifytime ASC ' .
                     "LIMIT ${count}",
                     array(
                         ':type' => $type,
+                        ':channel' => $channel,
                         ':value' => $meta['cond']
                     )
                 );