diff --git a/library/think/Response.php b/library/think/Response.php
index 8c35f87b..be0146aa 100644
--- a/library/think/Response.php
+++ b/library/think/Response.php
@@ -113,7 +113,7 @@ class Response
         }
         if (is_scalar($data)) {
             echo $data;
-        } else {
+        } elseif (!is_null($data)) {
             throw new Exception('不支持的数据类型输出：' . gettype($data));
         }