From bfd17d1ef5218c6e5f51e664473408f8ed02f859 Mon Sep 17 00:00:00 2001
From: Nick Briggs <nicholas.h.briggs@gmail.com>
Date: Wed, 15 Jul 2020 21:48:06 -0700
Subject: [PATCH] More systems that need to include unistd.h

	modified:   src/unixcomm.c
---
 src/unixcomm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/unixcomm.c b/src/unixcomm.c
index a51fe1f..827fb00 100644
--- a/src/unixcomm.c
+++ b/src/unixcomm.c
@@ -66,7 +66,7 @@ Unix Interface Communications
 #include <sys/un.h>
 #endif /* ISC */
 
-#ifdef SYSVONLY
+#if defined(SYSVONLY) || defined(FREEBSD) || defined(OS5) || defined(MACOSX)
 #include <unistd.h>
 #endif /* HPUX */