diff --git a/webapp/controller/RechargeController.class.php b/webapp/controller/RechargeController.class.php
index 93e1f70..848eae7 100644
--- a/webapp/controller/RechargeController.class.php
+++ b/webapp/controller/RechargeController.class.php
@@ -341,7 +341,7 @@ class RechargeController
         );
         $sign = phpcommon\md5Sign($params, 'NrN3zkVOzXF1vRzUc9eJM9ZKRO5eLooD', $_REQUEST['timestamp']);
         if ($sign != $_REQUEST['sign']) {
-            error_log('game2004api payNotify sign error:' + json_encode($_REQUEST));
+            error_log('game2004api payNotify sign error:' + $sign + '|' + json_encode($_REQUEST));
             echo json_encode(array(
                 'errcode' => 1,
                 'errmsg' => '签名校验失败'