1 files changed, 5 insertions, 2 deletions
diff --git a/optional.h b/optional.h
index c020abf..3916898 100644
--- a/optional.h
+++ b/optional.h
@@ -1,9 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /**
- * optional.h - some macros for optional types
+ * optional.h - Macros for optional types
  *
- * 2023 Yaroslav de la Peña Smirnov
+ * Copyright (C) 2023 Yaroslav de la Peña Smirnov
  *
+ * Poor man's optional "type templates" for C
  */
+
 #ifndef OPTIONAL_H
 #define OPTIONAL_H