diff --git a/src/arch/lora32u4ii/driver/stdout.cc b/src/arch/lora32u4ii/driver/stdout.cc
index ee45a4347fb03213a303d25f511821f877ce1223..e7ddd5f9d967efe5194af892fd22696354e3a69d 100644
--- a/src/arch/lora32u4ii/driver/stdout.cc
+++ b/src/arch/lora32u4ii/driver/stdout.cc
@@ -1,3 +1,8 @@
+/*
+ * Copyright 2021 Daniel Friesel
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
 #include "driver/stdout.h"
 #include <avr/io.h>