diff --git a/subid_maximal.c b/subid_maximal.c
index 76a4206a4a077eb15431c0f0bbe8b7e7b9e92f78..7e88d8023adcdee07770abf8026c14bfeef93209 100644
--- a/subid_maximal.c
+++ b/subid_maximal.c
@@ -1,3 +1,9 @@
+*
+* SPDX-FileCopyrightText: 2020 Anders Blomdell, <anders.blomdell@gmail.com> 
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
 #include <stdlib.h>
 #include <pwd.h>
 #include <shadow/subid.h>