diff --git a/webapp/services/BlockChainService.php b/webapp/services/BlockChainService.php
index f1ef161f..060a9481 100644
--- a/webapp/services/BlockChainService.php
+++ b/webapp/services/BlockChainService.php
@@ -46,6 +46,7 @@ class BlockChainService {
             'c' => 'GameItemMall',
             'a' => 'buy',
             'account' => $account,
+            'currency_name' => $currency,
             'price' => $price,
             'net_id' => NET_ID
         );