$OpenBSD: patch-src_memsize_c,v 1.1 2011/07/08 09:33:25 jasper Exp $
--- src/memsize.c.orig	Sat Nov 11 19:42:42 1995
+++ src/memsize.c	Fri Jul  8 11:31:35 2011
@@ -10,6 +10,7 @@
  */
 char	*id = "$Id: patch-src_memsize_c,v 1.1 2011/07/08 09:33:25 jasper Exp $\n";
 
+#include <stdlib.h>
 #include "timing.c"
 
 #define	CHK(x)	if ((x) == -1) { perror("x"); exit(1); }