-# pty_h.m4 serial 9
-dnl Copyright (C) 2009, 2010 Free Software Foundation, Inc.
+# pty_h.m4 serial 10
+dnl Copyright (C) 2009-2013 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
dnl Check for declarations of anything we want to poison if the
dnl corresponding gnulib module is not in use.
gl_WARN_ON_USE_PREPARE([[
+/* <sys/types.h> is a prerequisite of <libutil.h> on FreeBSD 8.0. */
+#include <sys/types.h>
#if HAVE_PTY_H
# include <pty.h>
#endif