diff --git a/sys/net/crosslayer/net_help/net_help.c b/sys/net/crosslayer/net_help/net_help.c
index 541090408c..963b060a7e 100644
--- a/sys/net/crosslayer/net_help/net_help.c
+++ b/sys/net/crosslayer/net_help/net_help.c
@@ -1,8 +1,16 @@
 /*
- * common.c
+ * Copyright (C) 2013  Freie Universität Berlin.
  *
- *  Created on: 05.10.2011
- *      Author: Oliver
+ * This file is subject to the terms and conditions of the GNU Lesser General
+ * Public License. See the file LICENSE in the top level directory for more
+ * details.
+ */
+
+/**
+ * @{
+ * @file    net_help.c
+ * @brief   Providing implementation for prototypes defined in net_help.h.
+ * @author  Oliver Gesch <oliver.gesch@googlemail.com>
  */
 
 #include <stdio.h>
@@ -59,3 +67,7 @@ uint16_t csum(uint16_t sum, uint8_t *buf, uint16_t len)
 
     return sum;
 }
+
+/**
+ * @}
+ */
diff --git a/sys/net/transport_layer/destiny/msg_help.c b/sys/net/transport_layer/destiny/msg_help.c
index bb01001f1e..69cdad4868 100644
--- a/sys/net/transport_layer/destiny/msg_help.c
+++ b/sys/net/transport_layer/destiny/msg_help.c
@@ -1,8 +1,16 @@
 /*
- * msg_help.c
+ * Copyright (C) 2013  Freie Universität Berlin.
  *
- *  Created on: 24.11.2011
- *      Author: Oliver
+ * This file is subject to the terms and conditions of the GNU Lesser General
+ * Public License. See the file LICENSE in the top level directory for more
+ * details.
+ */
+
+/**
+ * @{
+ * @file    msg_help.c
+ * @brief   Providing implementation for prototypes defined in msg_help.h.
+ * @author  Oliver Gesch <oliver.gesch@googlemail.com>
  */
 
 #include <stdio.h>
@@ -45,3 +53,7 @@ int net_msg_send_recv(msg_t *m, msg_t *reply, unsigned int pid, uint16_t message
     m->type = message;
     return msg_send_receive(m, reply, pid);;
 }
+
+/**
+ * @}
+ */
diff --git a/sys/net/transport_layer/destiny/msg_help.h b/sys/net/transport_layer/destiny/msg_help.h
index 6068dbbd29..257f19665e 100644
--- a/sys/net/transport_layer/destiny/msg_help.h
+++ b/sys/net/transport_layer/destiny/msg_help.h
@@ -1,10 +1,16 @@
 /*
- * msg_help.h
+ * Copyright (C) 2013  Freie Universität Berlin.
  *
- *  Created on: 24.11.2011
- *      Author: Oliver
+ * This file is subject to the terms and conditions of the GNU Lesser General
+ * Public License. See the file LICENSE in the top level directory for more
+ * details.
  */
 
+/**
+ * @{
+ * @file    msg_help.h
+ * @author  Oliver Gesch <oliver.gesch@googlemail.com>
+ */
 #ifndef MSG_HELP_H_
 #define MSG_HELP_H_
 
@@ -35,3 +41,6 @@ int net_msg_send(msg_t *m, unsigned int pid, bool block, uint16_t message);
 int net_msg_send_recv(msg_t *m, msg_t *reply, unsigned int pid, uint16_t message);
 
 #endif /* MSG_HELP_H_ */
+/**
+ * @}
+ */
diff --git a/sys/net/transport_layer/destiny/tcp_hc.h b/sys/net/transport_layer/destiny/tcp_hc.h
index 606b04c07b..3d89f68025 100644
--- a/sys/net/transport_layer/destiny/tcp_hc.h
+++ b/sys/net/transport_layer/destiny/tcp_hc.h
@@ -1,10 +1,16 @@
 /*
- * tcp_hc.h
+ * Copyright (C) 2013  Freie Universität Berlin.
  *
- *  Created on: 01.02.2012
- *      Author: Oliver
+ * This file is subject to the terms and conditions of the GNU Lesser General
+ * Public License. See the file LICENSE in the top level directory for more
+ * details.
  */
 
+/**
+ * @{
+ * @file    tcp_hc.c
+ * @author  Oliver Gesch <oliver.gesch@googlemail.com>
+ */
 #ifndef TCP_HC_H_
 #define TCP_HC_H_
 
@@ -25,3 +31,6 @@ uint16_t compress_tcp_packet(socket_internal_t *current_socket, uint8_t *current
 socket_internal_t *decompress_tcp_packet(ipv6_hdr_t *temp_ipv6_header);
 #endif
 #endif /* TCP_HC_H_ */
+/**
+ * @}
+ */
diff --git a/sys/net/transport_layer/destiny/tcp_timer.h b/sys/net/transport_layer/destiny/tcp_timer.h
index 2c0bdcdcf1..c88853e4ca 100644
--- a/sys/net/transport_layer/destiny/tcp_timer.h
+++ b/sys/net/transport_layer/destiny/tcp_timer.h
@@ -1,8 +1,15 @@
 /*
- * tcp_timer.h
+ * Copyright (C) 2013  Freie Universität Berlin.
  *
- *  Created on: 21.01.2012
- *      Author: Oliver
+ * This file is subject to the terms and conditions of the GNU Lesser General
+ * Public License. See the file LICENSE in the top level directory for more
+ * details.
+ */
+
+/**
+ * @{
+ * @file    tcp_timer.h
+ * @author  Oliver Gesch <oliver.gesch@googlemail.com>
  */
 
 #ifndef TCP_TIMER_H_
@@ -29,3 +36,6 @@
 void tcp_general_timer(void);
 
 #endif /* TCP_TIMER_H_ */
+/**
+ * @}
+ */