diff --git a/webapp/controller/RechargeController.class.php b/webapp/controller/RechargeController.class.php
index 45e2d37..1a6df7e 100644
--- a/webapp/controller/RechargeController.class.php
+++ b/webapp/controller/RechargeController.class.php
@@ -53,7 +53,7 @@ class RechargeController{
             return;
         }
 
-        if ($rsp === '') {
+        if ($rsp == null || $rsp == '') {
             phpcommon\sendError(ERR_RETRY, '系统繁忙2');
             return;
         }
@@ -101,8 +101,8 @@ class RechargeController{
             return;
         }
 
-        if ($rsp === '') {
-            phpcommon\sendError(ERR_RETRY, '系统繁忙2');
+        if ($rsp == null || $rsp == '') {
+            phpcommon\sendError(ERR_RETRY, '系统繁忙 2');
             return;
         }