add license annotations to ser.{c,h}

1 files changed, 4 insertions, 0 deletions

diff --git a/src/ser.c b/src/ser.c
index 998c81b..f06b7b2 100644
--- a/src/ser.c
+++ b/src/ser.c
@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2024 Lizzy Fleckenstein <lizzy@vlhl.dev>
+//
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
 #include <stdlib.h>
 #include <string.h>
 #include <endian.h>