1 files changed, 1 insertions, 0 deletions
diff --git a/nhrpd/os.h b/nhrpd/os.h
index 2b9e07f..3f3b0de 100644
--- a/nhrpd/os.h
+++ b/nhrpd/os.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 int os_socket(void);
 int os_sendmsg(const uint8_t *buf, size_t len, int ifindex, const uint8_t *addr,