diff --git a/src/PlusCalibration/vtkProbeCalibrationAlgo/vtkPlusProbeCalibrationOptimizerAlgo.cxx b/src/PlusCalibration/vtkProbeCalibrationAlgo/vtkPlusProbeCalibrationOptimizerAlgo.cxx
index 42d9e5ad5..5082d6284 100644
--- a/src/PlusCalibration/vtkProbeCalibrationAlgo/vtkPlusProbeCalibrationOptimizerAlgo.cxx
+++ b/src/PlusCalibration/vtkProbeCalibrationAlgo/vtkPlusProbeCalibrationOptimizerAlgo.cxx
@@ -18,6 +18,8 @@ See License.txt for details.
 
 #include "vtksys/SystemTools.hxx"
 
+#include <vnl/algo/vnl_svd.h>
+
 #include "itkPowellOptimizer.h"
 #include "itkScaleVersor3DTransform.h"
 #include "itkSimilarity3DTransform.h"
diff --git a/src/PlusCommon/PlusCommon.h b/src/PlusCommon/PlusCommon.h
index 7c6580576..7321f462f 100644
--- a/src/PlusCommon/PlusCommon.h
+++ b/src/PlusCommon/PlusCommon.h
@@ -51,7 +51,7 @@ class vtkXMLDataElement;
 
 namespace PlusCommon
 {
-  typedef itk::ImageIOBase::IOComponentType ITKScalarPixelType;
+  typedef itk::IOComponentEnum ITKScalarPixelType;
   typedef int VTKScalarPixelType;
   typedef int IGTLScalarPixelType;