--- /opt/test2/packages/BUILD/OpenCV-2.3.1a/i386/OpenCV-2.3.1/modules/core/include/opencv2/core/core.hpp.orig	Mon Feb  6 00:06:06 2012
+++ /opt/test2/packages/BUILD/OpenCV-2.3.1a/i386/OpenCV-2.3.1/modules/core/include/opencv2/core/core.hpp	Mon Feb  6 00:06:27 2012
@@ -61,6 +61,7 @@
 #include <new>
 #include <string>
 #include <vector>
+#include <sstream>
 #endif // SKIP_INCLUDES
 
 /*! \namespace cv