#ifndef __clitkOptNormalizedCorrelationImageToImageMetricFor3DBLUTFFD_h
#define __clitkOptNormalizedCorrelationImageToImageMetricFor3DBLUTFFD_h
-#include "itkOptImageToImageMetric.h"
+#if ITK_VERSION_MAJOR >= 4
+ #include "itkImageToImageMetric.h"
+#else
+ #include "itkOptImageToImageMetric.h"
+#endif
#include "itkCovariantVector.h"
#include "itkPoint.h"
#include "itkIndex.h"