--- OpenPTC-GGI-0.5.0/source/Core/Timer.cc.orig	Mon May  3 20:06:57 1999
+++ OpenPTC-GGI-0.5.0/source/Core/Timer.cc	Sat Dec 21 09:51:16 2002
@@ -5,6 +5,7 @@
 //
 
 // include files
+#include <stdlib.h>
 #include <sys/time.h>
 #include "Timer.h"
 #include "Error.h"