From dca8521c5a2c0c6a41c7aae5744254cc94599af0 Mon Sep 17 00:00:00 2001
From: "Richard M. Stallman" <rms@gnu.org>
Date: Sat, 29 Apr 1995 23:02:54 +0000
Subject: [PATCH] [HAVE_UNISTD_H]: Include unistd.h.

---
 src/sysdep.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/sysdep.c b/src/sysdep.c
index 177f083d197..f73562efd5a 100644
--- a/src/sysdep.c
+++ b/src/sysdep.c
@@ -75,6 +75,11 @@ extern int h_errno;
 #include <sys/stat.h>
 #include <errno.h>
 
+/* Get _POSIX_VDISABLE, if it is available.  */
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
 #ifdef MSDOS	/* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
 #include <dos.h>
 #include "dosfns.h"
-- 
2.39.5