diff --git a/code/core/files.cmake b/code/core/files.cmake
index 3180ba9..c864ffa 100644
--- a/code/core/files.cmake
+++ b/code/core/files.cmake
@@ -1,59 +1,60 @@
 SET(CPP_FILES 
   rttbAccessorWithGeoInfoBase.cpp
   rttbDoseIteratorInterface.cpp
   rttbDVH.cpp
   rttbDVHCalculator.cpp
   rttbDVHSet.cpp
   rttbGenericDoseIterator.cpp
   rttbGenericMaskedDoseIterator.cpp
   rttbGeometricInfo.cpp
   rttbMaskedDoseIteratorInterface.cpp
   rttbMaskVoxel.cpp
   rttbStructure.cpp
   rttbStructureSet.cpp
   rttbStrVectorStructureSetGenerator.cpp
   rttbUtils.cpp
   rttbMutableMaskAccessorInterface.cpp
+  rttbMutableDoseAccessorInterface.cpp
   )
 
 SET(H_FILES 
   rttbAccessorInterface.h
   rttbAccessorWithGeoInfoBase.h
   rttbBaseType.h
   rttbDataNotAvailableException.h
   rttbDoseAccessorInterface.h
   rttbDoseIteratorInterface.h
   rttbDoseAccessorGeneratorBase.h
   rttbDoseAccessorGeneratorInterface.h
   rttbDVH.h
   rttbDVHCalculator.h
   rttbDVHGeneratorInterface.h
   rttbDVHSet.h
   rttbException.h
   rttbExceptionMacros.h
   rttbGenericDoseIterator.h
   rttbGenericMaskedDoseIterator.h
   rttbGeometricInfo.h
   rttbIndexConversionInterface.h
   rttbIndexOutOfBoundsException.h
   rttbInvalidDoseException.h
   rttbInvalidParameterException.h
   rttbMappingOutsideOfImageException.h
   rttbMaskAccessorGeneratorBase.h
   rttbMaskAccessorGeneratorInterface.h
   rttbMaskAccessorInterface.h
   rttbMaskAccessorProcessorBase.h
   rttbMaskAccessorProcessorInterface.h
   rttbMaskedDoseIteratorInterface.h
   rttbMaskVoxel.h
   rttbMutableDoseAccessorInterface.h
   rttbMutableMaskAccessorInterface.h
   rttbNullPointerException.h
   rttbPaddingException.h
   rttbStructure.h
   rttbStructureSet.h
   rttbStructureSetGeneratorInterface.h
   rttbStrVectorStructureSetGenerator.h
   rttbUtils.h
   rttbCommon.h
 )
diff --git a/code/core/rttbMutableDoseAccessorInterface.cpp b/code/core/rttbMutableDoseAccessorInterface.cpp
new file mode 100644
index 0000000..1a425c9
--- /dev/null
+++ b/code/core/rttbMutableDoseAccessorInterface.cpp
@@ -0,0 +1,21 @@
+// -----------------------------------------------------------------------
+// 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.
+//
+//------------------------------------------------------------------------
+
+
+#include "rttbMutableDoseAccessorInterface.h"
+
+//This file was added, because on windows some compiler
+//do not export the class symbols correctly if only the
+//header is specified.