Index: uspace/lib/nettl/doc/doxygroups.h
===================================================================
--- uspace/lib/nettl/doc/doxygroups.h	(revision 1dbba6cd1b54df20edd184ed068689b1c49213eb)
+++ uspace/lib/nettl/doc/doxygroups.h	(revision 95feb3e9a91ca0a063b411e7590dda8fc92b7674)
@@ -1,2 +1,6 @@
+/*
+ * SPDX-FileCopyrightText: 2022 HelenOS Project
+ * SPDX-License-Identifier: CC0-1.0
+ */
 /** @addtogroup libnettl libnettl
  * @ingroup libs