diff -ruN FreeCAD-0.11.4422.orig/src/zipios++/directory.h FreeCAD-0.11.4422/src/zipios++/directory.h
--- FreeCAD-0.11.4422.orig/src/zipios++/directory.h	2011-02-11 01:48:21.000000000 +0100
+++ FreeCAD-0.11.4422/src/zipios++/directory.h	2011-11-13 22:11:27.000000000 +0100
@@ -31,6 +31,7 @@
 #include <string>
 #include <ctime>
 #include <stdexcept>
+#include <cstddef>
 
 // #include <boost.h>  Contents of boost.h