From 56762edef77a460b6eb465e6434f1b7d16d22327 Mon Sep 17 00:00:00 2001
From: crc <crc@noemail.net>
Date: Tue, 12 Oct 2021 13:25:12 +0000
Subject: [PATCH] fix a compiler warning

FossilOrigin-Name: 545ccff8298ca17f333e556fbb57ec6ce43bb8624906a18e871d4cacb4077a48
---
 vm/nga-c/retro.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/vm/nga-c/retro.c b/vm/nga-c/retro.c
index db86aa1..8c42ceb 100644
--- a/vm/nga-c/retro.c
+++ b/vm/nga-c/retro.c
@@ -22,6 +22,7 @@
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <time.h>
+#include <unistd.h>
 
 #ifdef ENABLE_SIGNALS
 #include <signal.h>