diff --git a/backstage/application/backstage/controllers/Recharge.php b/backstage/application/backstage/controllers/Recharge.php
index 8cd1679..cca6821 100644
--- a/backstage/application/backstage/controllers/Recharge.php
+++ b/backstage/application/backstage/controllers/Recharge.php
@@ -1460,8 +1460,8 @@ class Recharge extends CI_Controller
             $data['price'] = trim($info['price']);
             $data['start_amount_range'] = trim($info['start_amount_range']);
             $data['end_amount_range'] = trim($info['end_amount_range']);
-            $data['start_day'] = trim($info['start_day']);
-            $data['end_day'] = trim($info['end_day']);
+            $data['start_day'] = $info['start_day'] ? trim($info['start_day']) : null;
+            $data['end_day'] = $info['end_day'] ? trim($info['end_day']) : null;
 
             $data['start_time'] = trim($info['start_time']);
             $data['end_time'] = trim($info['end_time']);