diff --git a/sys/shell/commands/sc_cc2420.c b/sys/shell/commands/sc_cc2420.c
index 92a576797f..03690761c0 100644
--- a/sys/shell/commands/sc_cc2420.c
+++ b/sys/shell/commands/sc_cc2420.c
@@ -1,3 +1,23 @@
+/*
+ * Copyright (C) 2013 Milan Babel <babel@inf.fu-berlin.de>
+ *
+ * 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.
+ */
+
+/**
+ * @ingroup shell_commands
+ * @{
+ *
+ * @file
+ * @brief provides shell commands to configure cc2420 driver
+ *
+ * @author Milan Babel <babel@inf.fu-berlin.de>
+ *
+ * @}
+ */
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
diff --git a/sys/uart0/uart0.c b/sys/uart0/uart0.c
index 40d7b714b0..a37b456e67 100644
--- a/sys/uart0/uart0.c
+++ b/sys/uart0/uart0.c
@@ -1,3 +1,24 @@
+/*
+ * Copyright (C) 2013 INRIA
+ *
+ * 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.
+ */
+
+/**
+ * @ingroup sys
+ * @{
+ *
+ * @file
+ * @brief UART implementation
+ *
+ * @author      Oliver Hahm <oliver.hahm@inria.fr>
+ * @author      Ludwig Ortmann <ludwig.ortmann@fu-berlin.de>
+ *
+ * @}
+ */
+
 #include <stdio.h>
 
 #include "cpu-conf.h"