diff --git a/webapp/controller/RechargeController.class.php b/webapp/controller/RechargeController.class.php
index 224406f..e737bcb 100644
--- a/webapp/controller/RechargeController.class.php
+++ b/webapp/controller/RechargeController.class.php
@@ -346,7 +346,7 @@ class RechargeController
             ':' + $_REQUEST['timestamp'] + 'NrN3zkVOzXF1vRzUc9eJM9ZKRO5eLooD';
         // $sign = phpcommon\md5Sign($params, 'NrN3zkVOzXF1vRzUc9eJM9ZKRO5eLooD', $_REQUEST['timestamp']);
         $sign = md5($oristr);
-        error_log($sign + '|' + $$_REQUEST['sign']);
+        error_log($sign + '|' + $_REQUEST['sign']);
         if ($sign != $_REQUEST['sign']) {
             error_log('game2004api payNotify sign error:' + $sign + '|' + json_encode($_REQUEST));
             echo json_encode(array(