diff --git a/lib/decoding/osmocom/coding/gsm0503_mapping.h b/lib/decoding/osmocom/coding/gsm0503_mapping.h
index 417a94f..f391e8d 100644
--- a/lib/decoding/osmocom/coding/gsm0503_mapping.h
+++ b/lib/decoding/osmocom/coding/gsm0503_mapping.h
@@ -1,27 +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_mapping.c
+ *  GSM TS 05.03 burst mapping.
  */
- 
+
 #pragma once
 
 #include <osmocom/core/bits.h>
+//#include "bits.h"
+
+/*! \addtogroup mapping
+ *  @{
+ * \file gsm0503_mapping.h */
 
 void gsm0503_xcch_burst_unmap(sbit_t *iB, const sbit_t *eB,
 	sbit_t *hl, sbit_t *hn);
@@ -52,3 +40,5 @@
 	sbit_t *hi, sbit_t *up, int B);
 
 void gsm0503_mcs5_burst_swap(sbit_t *eB);
+
+/*! @} */