diff --git a/arcfour.c b/arcfour.c
index f5d7054003113225ea2d6b14d9f7df222a8dbfa0..100f9cc01447f88638e91cd61d6adee172da8783 100644
--- a/arcfour.c
+++ b/arcfour.c
@@ -7,6 +7,25 @@
  *   
  */
 
+/* lsh, an implementation of the ssh protocol
+ *
+ * Copyright (C) 1998 Niels M�ller
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
 #include "arcfour.h"
 
 #ifdef RCSID