diff --git a/src/gsm/gprs_cipher_core.c b/src/gsm/gprs_cipher_core.c
index b833048..fc68c40 100644
--- a/src/gsm/gprs_cipher_core.c
+++ b/src/gsm/gprs_cipher_core.c
@@ -1,6 +1,7 @@
-/* GPRS LLC cipher core infrastructure */
-
-/* (C) 2010 by Harald Welte <laforge@gnumonks.org>
+/*! \file gprs_cipher_core.c
+ * GPRS LLC cipher core infrastructure */
+/*
+ * (C) 2010 by Harald Welte <laforge@gnumonks.org>
  *
  * All Rights Reserved
  *