--- gforth/Attic/io.c	1996/10/06 22:24:17	1.18
+++ gforth/Attic/io.c	1997/02/16 20:51:08	1.19
@@ -28,7 +28,7 @@
 #include "config.h"
 #include <unistd.h>
 
-#ifdef apollo
+#if defined(apollo) || defined(_WIN32)
 #define _POSIX_VERSION
 #endif