diff --git a/library/think/Log.php b/library/think/Log.php
index 6aa62a5e..e9d2bb58 100644
--- a/library/think/Log.php
+++ b/library/think/Log.php
@@ -67,12 +67,12 @@ class Log
      */
     public static function init($config = [])
     {
-        self::$config = $config;
-        unset($config['type']);
-
         $type  = isset($config['type']) ? $config['type'] : 'File';
         $class = false !== strpos($type, '\\') ? $type : '\\think\\log\\driver\\' . ucwords($type);
 
+        self::$config = $config;
+        unset($config['type']);
+
         if (class_exists($class)) {
             self::$driver = new $class($config);
         } else {