--- src/util/thread.c.orig	2009-03-28 10:50:49.817619387 +0000
+++ src/util/thread.c	2009-03-28 10:59:40.048185946 +0000
@@ -1,3 +1,4 @@
+#include <stdlib.h>
 #ifndef _plan9_
 #include <signal.h>
 #include <stdio.h>