diff --git a/src/web/server/maestro/request_upgrade_maestro.php b/src/web/server/maestro/request_upgrade_maestro.php
index 54ce3a6..5a46c96 100644
--- a/src/web/server/maestro/request_upgrade_maestro.php
+++ b/src/web/server/maestro/request_upgrade_maestro.php
@@ -33,7 +33,7 @@ if($countUpgrade === null || $countUpgrade < 1) {
 }
 
 $maestro_data = get_maestro_data($maestro_id);
-sendMailUpgradeBankInfo($maestro_data["name"], $$maestro_data["email"], $registered_acount_type, $upgrade_account_type);
+sendMailUpgradeBankInfo($maestro_data["name"], $maestro_data["email"], $registered_acount_type, $upgrade_account_type);
 
 send_result_success();
 exit;