diff --git a/webapp/services/MissionService.php b/webapp/services/MissionService.php
index 94754503..e100bdd2 100644
--- a/webapp/services/MissionService.php
+++ b/webapp/services/MissionService.php
@@ -811,7 +811,7 @@ class MissionService extends BaseService {
         }
         myself()->_decItems(array(
             array(
-                'item_id' => V_ITEM_DIAMOND,
+                'item_id' => V_ITEM_GOLD,
                 'item_num' => $missionMeta['boost']
             )
         ));