diff --git a/protocol/vless/outbound.go b/protocol/vless/outbound.go
index d8132cf9..36c450a7 100644
--- a/protocol/vless/outbound.go
+++ b/protocol/vless/outbound.go
@@ -83,7 +83,7 @@ func NewOutbound(ctx context.Context, router adapter.Router, logger log.ContextL
 		case "xudp":
 			outbound.xudp = true
 		default:
-			return nil, E.New("unknown packet encoding: ", options.PacketEncoding)
+			return nil, E.New("unknown packet encoding: ", *options.PacketEncoding)
 		}
 	}
 	outbound.client, err = vless.NewClient(options.UUID, options.Flow, logger)