diff --git a/library/think/log/driver/File.php b/library/think/log/driver/File.php
index 89eb000a..5f0c8e2a 100644
--- a/library/think/log/driver/File.php
+++ b/library/think/log/driver/File.php
@@ -71,7 +71,8 @@ class File
 
         $server = isset($_SERVER['SERVER_ADDR']) ? $_SERVER['SERVER_ADDR'] : '0.0.0.0';
         $remote = isset($_SERVER['REMOTE_ADDR']) ? $_SERVER['REMOTE_ADDR'] : '0.0.0.0';
-        error_log("[{$now}] {$server} {$remote} {$_SERVER['REQUEST_URI']}\r\n{$info}\r\n", 3, $destination);
+        $uri    = isset($_SERVER['REQUEST_URI']) ? $_SERVER['REQUEST_URI'] : '';
+        error_log("[{$now}] {$server} {$remote} {$uri}\r\n{$info}\r\n", 3, $destination);
     }
 
 }