diff --git a/lib/decoding/osmocom/coding/gsm0503_parity.h b/lib/decoding/osmocom/coding/gsm0503_parity.h
index 6d8a062..28a5444 100644
--- a/lib/decoding/osmocom/coding/gsm0503_parity.h
+++ b/lib/decoding/osmocom/coding/gsm0503_parity.h
@@ -1,28 +1,15 @@
-/*
- * (C) 2013 by Andreas Eversberg <jolly@eversberg.eu>
- * (C) 2016 by Tom Tsou <tom.tsou@ettus.com>
- *
- * All Rights Reserved
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+/*! \file gsm0503_parity.h
+ *  GSM TS 05.03 parity.
  */
- 
+
 #pragma once
 
 #include <osmocom/core/crcgen.h>
 
+/*! \addtogroup parity
+ *  @{
+ * \file gsm0503_parity.h */
+
 const struct osmo_crc64gen_code gsm0503_fire_crc40;
 const struct osmo_crc16gen_code gsm0503_cs234_crc16;
 const struct osmo_crc8gen_code gsm0503_mcs_crc8_hdr;
@@ -32,3 +19,5 @@
 const struct osmo_crc8gen_code gsm0503_tch_fr_crc3;
 const struct osmo_crc8gen_code gsm0503_tch_efr_crc8;
 const struct osmo_crc8gen_code gsm0503_amr_crc6;
+
+/*! @} */