diff --git a/sw/lib/ocaml/defivybus.ml b/sw/lib/ocaml/defivybus.ml
index 214bc3c3c5..d2f67e84d9 100644
--- a/sw/lib/ocaml/defivybus.ml
+++ b/sw/lib/ocaml/defivybus.ml
@@ -1,4 +1,28 @@
-open Printf
+(*
+ * $Id$
+ *
+ * Default ivy bus address selection
+ *  
+ * Copyright (C) 2011 Eric Parsonage
+ *
+ * This file is part of paparazzi.
+ *
+ * paparazzi 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, or (at your option)
+ * any later version.
+ *
+ * paparazzi 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 paparazzi; see the file COPYING.  If not, write to
+ * the Free Software Foundation, 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA. 
+ *
+ *)
 
 let read_process_output command =
   let buffer_size = 2048 in
@@ -19,10 +43,9 @@ let contains s substring =
 
 let default_ivy_bus = 
   try (Sys.getenv "IVY_BUS" )
-   with  Not_found ->  
-   (if contains (read_process_output "uname") "Darwin" then       
-      "224.255.255.255:2010" 
-    else  
-      "127.255.255.255:2010")
-
+    with  Not_found ->    
+     (if contains (read_process_output "uname") "Darwin" then       
+        "224.255.255.255:2010" 
+      else  
+        "127.255.255.255:2010")