diff --git a/app/api/cache/TokenCache.php b/app/api/cache/TokenCache.php
index 1f64d1f..5cc787d 100644
--- a/app/api/cache/TokenCache.php
+++ b/app/api/cache/TokenCache.php
@@ -47,7 +47,7 @@ class TokenCache extends CacheBase
             ->update(['update_time' => $time, 'expire_time' => $expire_time]);
 
         //返回用户信息
-        $user_info = Db::name('user u')
+        $user_info = Db::name('user')->alias('u')
             ->join('session s', 'u.id=s.user_id')
             ->where(['s.token' => $this->extend['token']])
             ->field('u.*,s.token,s.client')