--- l2tpns-2.1.21.orig/cli.c	2005-12-06 10:43:42.000000000 +0100
+++ l2tpns-2.1.21/cli.c	2013-12-21 14:33:08.000000000 +0100
@@ -4,6 +4,7 @@
 char const *cvs_name = "$Name: release_2_1_21 $";
 char const *cvs_id_cli = "$Id: cli.c,v 1.71 2005/12/06 09:43:42 bodea Exp $";
 
+#include <fcntl.h>
 #include <stdio.h>
 #include <stddef.h>
 #include <stdarg.h>