diff --git a/webapp/controller/ActivityController.class.php b/webapp/controller/ActivityController.class.php
index 5045cdd..5a55128 100644
--- a/webapp/controller/ActivityController.class.php
+++ b/webapp/controller/ActivityController.class.php
@@ -459,6 +459,9 @@ class ActivityController{
                 if ($last_conf && $now_days >= $last_conf['day']) {
                     $now_days = $last_conf['day'];
                 }
+                if (!$now_days) {
+                    $now_days == 1;
+                }
             }
             $ret = $conn->execScript('UPDATE activity SET video_times=:video_times,item_id=:item_id, item_num=:item_num, modify_time=:modify_time, now_days=:now_days ' .
                                      ' WHERE accountid=:accountid;',