diff --git a/src/transport/transport.h b/src/transport/transport.h
index f052785..81d7b61 100644
--- a/src/transport/transport.h
+++ b/src/transport/transport.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later */
 #ifndef LIBPLDM_SRC_TRANSPORT_TRANSPORT_H
 #define LIBPLDM_SRC_TRANSPORT_TRANSPORT_H