diff --git a/code/interpolation/rttbLinearInterpolation.h b/code/interpolation/rttbLinearInterpolation.h
index 3308afb..1731a34 100644
--- a/code/interpolation/rttbLinearInterpolation.h
+++ b/code/interpolation/rttbLinearInterpolation.h
@@ -1,60 +1,62 @@
 // -----------------------------------------------------------------------
 // RTToolbox - DKFZ radiotherapy quantitative evaluation library
 //
 // Copyright (c) German Cancer Research Center (DKFZ),
 // Software development for Integrated Diagnostics and Therapy (SIDT).
 // ALL RIGHTS RESERVED.
 // See rttbCopyright.txt or
 // http://www.dkfz.de/en/sidt/projects/rttb/copyright.html
 //
 // This software is distributed WITHOUT ANY WARRANTY; without even
 // the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 // PURPOSE.  See the above copyright notices for more information.
 //
 //------------------------------------------------------------------------
 /*!
 // @file
 // @version $Revision$ (last changed revision)
 // @date    $Date$ (last change date)
 // @author  $Author$ (last changed by)
 */
 
 #ifndef __LINEAR_INTERPOLATION_H
 #define __LINEAR_INTERPOLATION_H
 
 #include <boost/array.hpp>
 
 #include "rttbInterpolationBase.h"
 
+#include "RTTBInterpolationExports.h"
+
 namespace rttb
 {
 
 	namespace interpolation
 	{
 
 		/*! @class LinearInterpolation
 			@brief Linear interpolation.
 			@ingroup interpolation
 		*/
-		class LinearInterpolation : public InterpolationBase
+        class RTTBInterpolation_EXPORT LinearInterpolation : public InterpolationBase
 		{
 		public:
 			/*! @brief Constructor
 			*/
 			LinearInterpolation() {};
 			/*! @brief Returns the interpolated value
 			*/
 			DoseTypeGy getValue(const WorldCoordinate3D& aWorldCoordinate) const;
 
 		private:
 			/*! @brief Trilinar interpolation
 				@sa InterpolationBase for details about target and values
 				@note Source: http://en.wikipedia.org/wiki/Trilinear_interpolation
 			*/
 			DoseTypeGy trilinear(boost::array<double, 3> target, boost::shared_ptr<DoseTypeGy[]> values) const;
 		};
 
 	}
 }
 
 #endif
diff --git a/code/interpolation/rttbNearestNeighborInterpolation.h b/code/interpolation/rttbNearestNeighborInterpolation.h
index c20ad85..81aa254 100644
--- a/code/interpolation/rttbNearestNeighborInterpolation.h
+++ b/code/interpolation/rttbNearestNeighborInterpolation.h
@@ -1,51 +1,53 @@
 // -----------------------------------------------------------------------
 // RTToolbox - DKFZ radiotherapy quantitative evaluation library
 //
 // Copyright (c) German Cancer Research Center (DKFZ),
 // Software development for Integrated Diagnostics and Therapy (SIDT).
 // ALL RIGHTS RESERVED.
 // See rttbCopyright.txt or
 // http://www.dkfz.de/en/sidt/projects/rttb/copyright.html
 //
 // This software is distributed WITHOUT ANY WARRANTY; without even
 // the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 // PURPOSE.  See the above copyright notices for more information.
 //
 //------------------------------------------------------------------------
 /*!
 // @file
 // @version $Revision$ (last changed revision)
 // @date    $Date$ (last change date)
 // @author  $Author$ (last changed by)
 */
 
 #ifndef __NEAREST_NEIGHBOR_INTERPOLATION_H
 #define __NEAREST_NEIGHBOR_INTERPOLATION_H
 
 #include "rttbInterpolationBase.h"
 
+#include "RTTBInterpolationExports.h"
+
 namespace rttb
 {
 	namespace interpolation
 	{
 
 		/*! @class NearestNeighborInterpolation
 			@brief Nearest Neighbor interpolation
 			@ingroup interpolation
 		*/
-		class NearestNeighborInterpolation : public InterpolationBase
+        class RTTBInterpolation_EXPORT NearestNeighborInterpolation : public InterpolationBase
 		{
 		public:
 			/*! @brief Constructor
 			*/
 			NearestNeighborInterpolation() {};
 
 			/*! @brief Returns the interpolated value (the nearest voxel value given by _spOriginalData->getGeometricInfo().worldCoordinateToIndex())
 			*/
 			DoseTypeGy getValue(const WorldCoordinate3D& aWorldCoordinate) const;
 		};
 
 	}
 }
 
 #endif
diff --git a/code/interpolation/rttbSimpleMappableDoseAccessor.h b/code/interpolation/rttbSimpleMappableDoseAccessor.h
index 06dcb9a..7390e87 100644
--- a/code/interpolation/rttbSimpleMappableDoseAccessor.h
+++ b/code/interpolation/rttbSimpleMappableDoseAccessor.h
@@ -1,75 +1,77 @@
 // -----------------------------------------------------------------------
 // RTToolbox - DKFZ radiotherapy quantitative evaluation library
 //
 // Copyright (c) German Cancer Research Center (DKFZ),
 // Software development for Integrated Diagnostics and Therapy (SIDT).
 // ALL RIGHTS RESERVED.
 // See rttbCopyright.txt or
 // http://www.dkfz.de/en/sidt/projects/rttb/copyright.html
 //
 // This software is distributed WITHOUT ANY WARRANTY; without even
 // the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 // PURPOSE.  See the above copyright notices for more information.
 //
 //------------------------------------------------------------------------
 /*!
 // @file
 // @version $Revision$ (last changed revision)
 // @date    $Date$ (last change date)
 // @author  $Author$ (last changed by)
 */
 #ifndef __SIMPLE_MAPPABLE_DOSE_ACCESSOR_H
 #define __SIMPLE_MAPPABLE_DOSE_ACCESSOR_H
 
 #include <boost/shared_ptr.hpp>
 
 #include "rttbBaseType.h"
 #include "rttbInterpolationBase.h"
 #include "rttbTransformationInterface.h"
 #include "rttbMappableDoseAccessorInterface.h"
 
+#include "RTTBInterpolationExports.h"
+
 namespace rttb
 {
 	namespace interpolation
 	{
 
 		/*! @class SimpleMappableDoseAccessor
 		@brief Class for dose mapping based on simple trilinear interpolation
 		@ingroup interpolation
 		*/
-		class SimpleMappableDoseAccessor: public MappableDoseAccessorInterface
+        class RTTBInterpolation_EXPORT SimpleMappableDoseAccessor : public MappableDoseAccessorInterface
 		{
 		private:
 			InterpolationBase::Pointer _spInterpolation;
 		public:
 			typedef boost::shared_ptr<SimpleMappableDoseAccessor> Pointer;
 
 			/*! @brief Constructor. Just hands values over to base class constructor.
 				@param aInterpolation the used interpolation.
 				@sa MappableDoseAccessorBase
 			*/
 			SimpleMappableDoseAccessor(const core::GeometricInfo& geoInfoTargetImage,
 			                           const DoseAccessorPointer doseMovingImage,
 			                           const TransformationInterface::Pointer aTransformation,
 			                           const InterpolationBase::Pointer aInterpolation,
 			                           bool acceptPadding = true,
 			                           DoseTypeGy defaultOutsideValue = 0.0);
 
 			/*! @brief Virtual destructor of class
 			*/
 			virtual ~SimpleMappableDoseAccessor() {};
 			/*! @brief Returns the dose for a given voxel grid id. Plain trilinear interpolation is performed.
 				@sa getDoseAt(const VoxelGridIndex3D& aIndex)
 			*/
 			GenericValueType getValueAt(const VoxelGridID aID) const;
 
 			/*! @brief Returns the dose for a given voxel grid index. Plain trilinear interpolation is performed.
 				@return the dose or if (isOutside==true && _acceptPadding==true) then _defaultValue
 				@exception core::MappingOutsideOfImageException if the point is mapped outside and if _acceptPadding==false, possibly returning _defaultValue)
 			*/
 			GenericValueType getValueAt(const VoxelGridIndex3D& aIndex) const;
 		};
 	}
 }
 
 #endif