diff --git a/service/xboard/service.go b/service/xboard/service.go
index 6eee0617..af362856 100644
--- a/service/xboard/service.go
+++ b/service/xboard/service.go
@@ -626,7 +626,6 @@ func (s *Service) setupNode() error {
 			ssOptions.Password = ss2022Key(serverKey, keyLen)
 
 			// Create a dummy user (will be replaced by syncUsers)
-			keyLen := ss2022KeyLength(method)
 			dummyKey := make([]byte, keyLen)
 			_, _ = rand.Read(dummyKey)
 			ssOptions.Users = []option.ShadowsocksUser{{