diff --git a/app/common/service/qrcode/InviteUser.php b/app/common/service/qrcode/InviteUser.php
index 99ec92ff..015b1a64 100644
--- a/app/common/service/qrcode/InviteUser.php
+++ b/app/common/service/qrcode/InviteUser.php
@@ -109,7 +109,7 @@ class InviteUser extends BaseQRcode
      */
     private function getPosterName(): string
     {
-        return 'invite_' . md5("{$this->userInfo['user_id']}_$this->channel_$this->type") . '.png';
+        return 'invite_' . md5("{$this->userInfo['user_id']}_$this->channel" . $this->type) . '.png';
     }
 
     /**