#ifdef MAIL_USE_SYSTEM_LOCK
if (! preserve_mail)
{
-#if defined (STRIDE) || defined (XENIX) || defined (WINDOWSNT)
+#if defined (STRIDE) || defined (XENIX)
/* Stride, xenix have file locking, but no ftruncate.
This mess will do. */
close (open (inname, O_CREAT | O_TRUNC | O_RDWR, 0666));