diff -ru arc-5.21o.orig/arcdos.c arc-5.21o/arcdos.c
--- arc-5.21o.orig/arcdos.c	2008-03-30 15:44:53 +0200
+++ arc-5.21o/arcdos.c	2008-03-30 15:45:51 +0200
@@ -30,7 +30,7 @@
 #if	UNIX
 #include <sys/types.h>
 #include <sys/stat.h>
-#if	BSD
+#if	BSD || defined(__INTERIX)
 #include <sys/time.h>
 #else	
 #include <time.h>		/* Sys V. Bleah. */