diff --git a/LICENSE b/LICENSE
index af1764d4f1..2f93aac2df 100644
--- a/LICENSE
+++ b/LICENSE
@@ -214,7 +214,6 @@ include/nuttx/net/ip.h
 include/nuttx/net/netconfig.h
 include/nuttx/net/netdev.h
 include/nuttx/net/netstats.h
-include/nuttx/net/sixlowpan.h
 include/nuttx/net/tcp.h
 include/nuttx/net/tun.h
 include/nuttx/net/udp.h
@@ -6168,3 +6167,51 @@ LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 POSSIBILITY OF SUCH DAMAGE.
 
+net/sixlowpan/sixlowpan_framelist.c
+net/sixlowpan/sixlowpan_hc06.c
+net/sixlowpan/sixlowpan_hc1.c
+net/sixlowpan/sixlowpan_input.c
+net/sixlowpan/sixlowpan_internal.h
+net/sixlowpan/sixlowpan_utils.c
+include/nuttx/net/sixlowpan.h
+============================
+
+   Copyright (C) 2017-2018 Gregory Nutt. All rights reserved.
+   Author: Gregory Nutt <gnutt@nuttx.org>
+
+ Parts of this file derive from Contiki:
+
+   Copyright (c) 2008, Swedish Institute of Computer Science.
+   All rights reserved.
+   Authors: Adam Dunkels <adam@sics.se>
+            Nicolas Tsiftes <nvt@sics.se>
+            Niclas Finne <nfi@sics.se>
+            Mathilde Durvy <mdurvy@cisco.com>
+            Julien Abeille <jabeille@cisco.com>
+            Joakim Eriksson <joakime@sics.se>
+            Joel Hoglund <joel@sics.se>
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+
+ 1. Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+ 2. Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+ 3. Neither the name of the Institute nor the names of its contributors
+    may be used to endorse or promote products derived from this software
+    without specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ SUCH DAMAGE.