diff --git a/library/think/response.php b/library/think/response.php
index a4d6c02d..4b209778 100644
--- a/library/think/response.php
+++ b/library/think/response.php
@@ -48,7 +48,7 @@ class Response
                 break;
             case 'jsonp':
                 // 返回JSON数据格式到客户端 包含状态信息
-                $handler = isset($_GET[Config::get('var_jsonp_handler')]) ? $_GET[Config::get('var_jsonp_handler')] : Config::get('default_jsonp_handler');
+                $handler = !empty($_GET[Config::get('var_jsonp_handler')]) ? $_GET[Config::get('var_jsonp_handler')] : Config::get('default_jsonp_handler');
                 $data    = $handler . '(' . \org\Transform::jsonEncode($data) . ');';
                 break;
         }