--- base/Behavior.cpp~	2003-11-20 10:46:16.000000000 -0600

+++ base/Behavior.cpp	2011-02-09 13:19:13.651559002 -0600

@@ -6,6 +6,7 @@

     email                : henqvist@excite.com

  ***************************************************************************/

+#include <cstddef>

 #include "Private.h"

 #include "Behavior.h"

 #include "Group.h"

--- base/BehaviorVisitor.cpp~	2003-11-20 10:46:16.000000000 -0600

+++ base/BehaviorVisitor.cpp	2011-02-09 13:26:17.561558995 -0600

@@ -6,6 +6,7 @@

     email                : henqvist@excite.com

  ***************************************************************************/

+#include <cstddef>

 #include "BehaviorVisitor.h"

 #include "Behavior.h"

 #include "Group.h"

--- base/SignalSender.cpp~	2003-11-20 10:46:16.000000000 -0600

+++ base/SignalSender.cpp	2011-02-09 13:35:29.151558926 -0600

@@ -7,6 +7,7 @@

  ***************************************************************************/

+#include <cstddef>

 #include "Private.h"

 #include "SignalSender.h"

 #include "Group.h"