$NetBSD$

--- rts/srx.c.orig	2005-03-01 16:26:10.000000000 +0000
+++ rts/srx.c
@@ -19,6 +19,7 @@
 #include "rts.h"
 #include <fcntl.h>
 #include <signal.h>
+#include <unistd.h>
 #include <sys/param.h>
 
 #ifdef __PARAGON__
