$OpenBSD: patch-demos_OISConsole_cpp,v 1.1 2017/04/09 21:16:34 sthen Exp $
--- demos/OISConsole.cpp.orig	Sun Apr  9 22:15:21 2017
+++ demos/OISConsole.cpp	Sun Apr  9 22:15:37 2017
@@ -12,6 +12,7 @@
 #include <iostream>
 #include <vector>
 #include <sstream>
+#include <unistd.h>
 
 ////////////////////////////////////Needed Windows Headers////////////
 #if defined OIS_WIN32_PLATFORM
