diff --git a/FlyCube/MpApi/Controller/PlaneController.class.php b/FlyCube/MpApi/Controller/PlaneController.class.php
index f207a73..5f2776c 100644
--- a/FlyCube/MpApi/Controller/PlaneController.class.php
+++ b/FlyCube/MpApi/Controller/PlaneController.class.php
@@ -266,7 +266,7 @@ class PlaneController extends PublicController
 				preg_match_all('/,/', $_REQUEST['bindroute'], $matches);
 				$data['runing'] = implode('', $matches[0]);
 			} else {
-				$data['bind_route'] = null;
+				$data['bind_route'] = '';
 			}
 			if ($_REQUEST['desc']) {
 				$data['describe'] = $_REQUEST['desc'];