diff --git a/src/cqbot/event/WSCloseEvent.php b/src/cqbot/event/WSCloseEvent.php
index 537a9470..892e25f6 100644
--- a/src/cqbot/event/WSCloseEvent.php
+++ b/src/cqbot/event/WSCloseEvent.php
@@ -11,7 +11,6 @@ class WSCloseEvent extends Event
     public function __construct(swoole_server $server, int $fd) {
         $connect = CQUtil::getConnection($fd);
         if ($connect->getPair() !== null) {
-            $connect->getPair()->setPair(null);
             $connect->setPair(null);
         }
         unset(Buffer::$connect[$fd]);