diff --git a/lib/decoding/osmocom/coding/gsm0503_parity.c b/lib/decoding/osmocom/coding/gsm0503_parity.c
index 50977f7..874114f 100644
--- a/lib/decoding/osmocom/coding/gsm0503_parity.c
+++ b/lib/decoding/osmocom/coding/gsm0503_parity.c
@@ -4,6 +4,8 @@
  *
  * All Rights Reserved
  *
+ * SPDX-License-Identifier: GPL-2.0+
+ *
  * 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
@@ -22,10 +24,19 @@
 #include <stdint.h>
 
 #include <osmocom/core/crcgen.h>
-#include "gsm0503_parity.h"
+#include <osmocom/coding/gsm0503_parity.h>
 
-/*
- * GSM (SACCH) parity (FIRE code)
+/*! \addtogroup parity
+ *  @{
+ *
+ *  GSM TS 05.03 parity
+ *
+ *  This module contains parity/crc code definitions for the various
+ *  parity/crc schemes as defined in 3GPP TS 05.03 / 45.003
+ *
+ * \file gsm0503_parity.c */
+
+/*! GSM (SACCH) parity (FIRE code)
  *
  * g(x) = (x^23 + 1)(x^17 + x^3 + 1)
  *      = x^40 + x^26 + x^23 + x^17 + x^3 + a1
@@ -37,8 +48,7 @@
 	.remainder = 0xffffffffffULL,
 };
 
-/*
- * GSM PDTCH CS-2, CS-3, CS-4 parity
+/*! GSM PDTCH CS-2, CS-3, CS-4 parity
  *
  * g(x) = x^16 + x^12 + x^5 + 1
  */
@@ -49,8 +59,7 @@
 	.remainder = 0xffff,
 };
 
-/*
- * EDGE MCS header parity
+/*! EDGE MCS header parity
  *
  */
 const struct osmo_crc8gen_code gsm0503_mcs_crc8_hdr = {
@@ -60,8 +69,7 @@
 	.remainder = 0xff,
 };
 
-/*
- * EDGE MCS data parity
+/*! EDGE MCS data parity
  *
  */
 const struct osmo_crc16gen_code gsm0503_mcs_crc12 = {
@@ -71,8 +79,7 @@
 	.remainder = 0x0fff,
 };
 
-/*
- * GSM RACH parity
+/*! GSM RACH parity
  *
  * g(x) = x^6 + x^5 + x^3 + x^2 + x^1 + 1
  */
@@ -83,8 +90,7 @@
 	.remainder = 0x3f,
 };
 
-/*
- * GSM SCH parity
+/*! GSM SCH parity
  *
  * g(x) = x^10 + x^8 + x^6 + x^5 + x^4 + x^2 + 1
  */
@@ -95,8 +101,7 @@
 	.remainder = 0x3ff,
 };
 
-/*
- * GSM TCH FR/HR/EFR parity
+/*! GSM TCH FR/HR/EFR parity
  *
  * g(x) = x^3 + x + 1
  */
@@ -107,8 +112,7 @@
 	.remainder = 0x7,
 };
 
-/*
- * GSM TCH EFR parity
+/*! GSM TCH EFR parity
  *
  * g(x) = x^8 + x^4 + x^3 + x^2 + 1
  */
@@ -119,8 +123,7 @@
 	.remainder = 0x00,
 };
 
-/*
- * GSM AMR parity
+/*! GSM AMR parity
  *
  * g(x) = x^6 + x^5 + x^3 + x^2 + x^1 + 1
  */
@@ -130,3 +133,5 @@
 	.init = 0x00,
 	.remainder = 0x3f,
 };
+
+/*! @} */