diff --git a/drivers/at86rf231/at86rf231_rx.c b/drivers/at86rf231/at86rf231_rx.c
index 2c2dd28bf64a21652899114fc0f637844caf59dc..cfa70cc76a599024aab7943d3981b4563f8401d4 100644
--- a/drivers/at86rf231/at86rf231_rx.c
+++ b/drivers/at86rf231/at86rf231_rx.c
@@ -1,3 +1,10 @@
+/*
+ * Copyright (C) 2014 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.
+ */
 
 #include "at86rf231.h"
 #include "at86rf231_arch.h"
diff --git a/drivers/at86rf231/at86rf231_spi.c b/drivers/at86rf231/at86rf231_spi.c
index 02322167a87e7ea092a55d76f4238d7292bede92..71bf94bb893431eefc58806d8ca9dddd875ec332 100644
--- a/drivers/at86rf231/at86rf231_spi.c
+++ b/drivers/at86rf231/at86rf231_spi.c
@@ -1,3 +1,11 @@
+/*
+ * Copyright (C) 2014 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.
+ */
+
 #include "at86rf231_spi.h"
 #include "at86rf231_arch.h"
 #include "at86rf231.h"
diff --git a/drivers/at86rf231/at86rf231_tx.c b/drivers/at86rf231/at86rf231_tx.c
index e7af47b351a09ff17dd406b29143ed8641d94a13..83eebbe6357a9f3af27c5deb1f323a9b52ee2961 100644
--- a/drivers/at86rf231/at86rf231_tx.c
+++ b/drivers/at86rf231/at86rf231_tx.c
@@ -1,3 +1,11 @@
+/*
+ * Copyright (C) 2014 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.
+ */
+
 #include "at86rf231.h"
 #include "at86rf231_arch.h"
 #include "at86rf231_spi.h"