diff -up coldet/src/box.h~ coldet/src/box.h
--- coldet/src/box.h~ 2001-02-23 19:08:22.000000000 +0100
+++ coldet/src/box.h 2011-02-13 19:52:56.049850991 +0100
@@ -25,6 +25,7 @@
#define H_BOX
#include <vector>
+#include <cstddef>
#include "math3d.h"
#include "sysdep.h"