--- memtest.c.orig	Tue Jul 18 22:13:31 2000
+++ memtest.c	Tue Jul 18 22:13:58 2000
@@ -20,6 +20,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <time.h>
+#include <sys/types.h>
 #include <sys/mman.h>
 #include <signal.h>
 #include <unistd.h>