diff --git a/library/think/log/driver/File.php b/library/think/log/driver/File.php
index fdf72658..d82a5243 100644
--- a/library/think/log/driver/File.php
+++ b/library/think/log/driver/File.php
@@ -76,7 +76,7 @@ class File
     {
         //检测日志文件大小，超过配置大小则备份日志文件重新生成
         if (is_file($destination) && floor($this->config['file_size']) <= filesize($destination)) {
-            rename($destination, dirname($destination) . DS . $_SERVER['REQUEST_TIME'] . '-' . basename($destination));
+            rename($destination, dirname($destination) . DS . time() . '-' . basename($destination));
             $this->writed[$destination] = false;
         }