diff --git a/src/cqbot/connection/RobotWSConnection.php b/src/cqbot/connection/RobotWSConnection.php
index 049e5631..36ed514c 100644
--- a/src/cqbot/connection/RobotWSConnection.php
+++ b/src/cqbot/connection/RobotWSConnection.php
@@ -24,8 +24,7 @@ class RobotWSConnection extends WSConnection
         $this->sub_type = $sub_type;
         foreach (ConnectionManager::getAll("robot") as $k => $v) {
             if ($v->getQQ() == $this->getQQ() && $k != $this->fd && $v->getSubType() == $this->getSubType()) {
-                $this->getServer()->close($k);
-                ConnectionManager::remove($k);
+                $v->close();
             }
         }
         if ($sub_type != "event") {
@@ -131,4 +130,4 @@ class RobotWSConnection extends WSConnection
     public function getSubType() {
         return $this->sub_type;
     }
-}
\ No newline at end of file
+}