diff --git a/luanetlink.c b/luanetlink.c
index 77109c40..fe54ae63 100644
--- a/luanetlink.c
+++ b/luanetlink.c
@@ -1,4 +1,5 @@
 /*
+ * Copyright (C) 2020  Matheus Rodrigues <matheussr61@gmail.com>
  * Copyright (C) 2017-2019  CUJO LLC
  *
  * This program is free software; you can redistribute it and/or modify
diff --git a/netlink_common.h b/netlink_common.h
index 3717baf0..5d03b852 100644
--- a/netlink_common.h
+++ b/netlink_common.h
@@ -1,4 +1,22 @@
-#ifndef NETLINK_COMMOM_H
+/*
+ * Copyright (C) 2020  Matheus Rodrigues <matheussr61@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+ifndef NETLINK_COMMOM_H
 #define NETLINK_COMMOM_H
 
 #ifdef _KERNEL