diff -uNr XQilla-2.2.4.ORIG/include/xqilla/framework/XPath2MemoryManager.hpp XQilla-2.2.4/include/xqilla/framework/XPath2MemoryManager.hpp
--- XQilla-2.2.4.ORIG/include/xqilla/framework/XPath2MemoryManager.hpp	2011-09-24 13:31:20.666469427 +0100
+++ XQilla-2.2.4/include/xqilla/framework/XPath2MemoryManager.hpp	2011-09-24 13:32:01.175470668 +0100
@@ -23,6 +23,7 @@
 #define __XPATH2MEMORYMANAGER_HPP
 
 #include <algorithm>
+#include <cstddef>
 #include <assert.h>
 
 #include <xqilla/framework/XQillaExport.hpp>