diff --git a/webapp/controller/OtherController.class.php b/webapp/controller/OtherController.class.php
index 886a7fd3..3383783b 100644
--- a/webapp/controller/OtherController.class.php
+++ b/webapp/controller/OtherController.class.php
@@ -193,7 +193,10 @@ class OtherController extends BaseAuthedController {
                     if (empty($taskStatus)) {
                         return true;
                     }
-                    if (myself()->_getNowTime() <= strtotime($taskMeta['obtain_end_time'])) {
+                    if (!$taskMeta) {
+                        return true;
+                    }
+                    if (myself()->_getNowTime() > strtotime($taskMeta['obtain_end_time'])) {
                         return true;
                     }
                 }