--- file_not_specified_in_diff	
+++ file_not_specified_in_diff	
@@ -, +, @@ 
--- a/OgreMain/include/OgreOptimisedUtil.h
+++ b/OgreMain/include/OgreOptimisedUtil.h
@@ -29,6 +29,7 @@ Torus Knot Software Ltd.
 #ifndef __OptimisedUtil_H__
 #define __OptimisedUtil_H__
 
+#include <cstddef>
 #include "OgrePrerequisites.h"
 #include "OgreEdgeListBuilder.h"