diff -urN OpenCV-2.2.0-orig/modules/core/include/opencv2/core/core.hpp OpenCV-2.2.0/modules/core/include/opencv2/core/core.hpp
--- OpenCV-2.2.0-orig/modules/core/include/opencv2/core/core.hpp	2010-12-05 05:35:24.000000000 +0200
+++ OpenCV-2.2.0/modules/core/include/opencv2/core/core.hpp	2010-12-23 19:47:11.414816501 +0200
@@ -56,6 +56,7 @@
 #include <algorithm>
 #include <cmath>
 #include <complex>
+#include <cstddef>
 #include <map>
 #include <new>
 #include <string>