diff --git a/Modules/DicomRT/include/mitkRTConstants.h b/Modules/DicomRT/include/mitkRTConstants.h
index f7be5b89b0..770ac52470 100644
--- a/Modules/DicomRT/include/mitkRTConstants.h
+++ b/Modules/DicomRT/include/mitkRTConstants.h
@@ -1,111 +1,120 @@
 /*===================================================================
 
 The Medical Imaging Interaction Toolkit (MITK)
 
 Copyright (c) German Cancer Research Center,
 Division of Medical and Biological Informatics.
 All rights reserved.
 
 This software is distributed WITHOUT ANY WARRANTY; without
 even the implied warranty of MERCHANTABILITY or FITNESS FOR
 A PARTICULAR PURPOSE.
 
 See LICENSE.txt or http://www.mitk.org for details.
 
 ===================================================================*/
 
 #ifndef _MITK_RT_CONSTANTS_H_
 #define _MITK_RT_CONSTANTS_H_
 
 #include <string>
 
 #include "MitkDicomRTExports.h"
 
+#ifdef _MSC_VER
+#  pragma warning(push)
+#  pragma warning(disable:4251)
+#endif
+
 namespace mitk
 {
 
 struct MITKDICOMRT_EXPORT RTConstants
 
 {
   /**
       * Name of the property that indicates if a data/node is a dose.
       */
   static const std::string DOSE_PROPERTY_NAME;
 
   /**
       * Name of the property that encodes the prescribed dose associated with the data node
       * If a RTPLAN file exists the value can be extracted from the tag (300A,0026) - Target Prescription Dose in the plan file.
       */
   static const std::string PRESCRIBED_DOSE_PROPERTY_NAME;
 
   /**
       * Name of the property that encodes the reference dose that should be used for relative dose vizualization/evaluation purpose.
       * It is often the prescribed dose but may differ e.g. when to dose distributions sould be compared using the same reference.
       */
   static const std::string REFERENCE_DOSE_PROPERTY_NAME;
 
   /**
   * Name of the property that encodes the reference structure set.
   */
   static const std::string REFERENCE_STRUCTURE_SET_PROPERTY_NAME;
 
   /**
       * Name of the property that encodes the optional string property holding the information from the tag (3004,0004) - Dose Type.
       * This contains useful information for medical doctors
       */
   static const std::string DOSE_TYPE_PROPERTY_NAME;
 
   /**
   * Name of the property that encodes the optional string property holding the description information from the tag (300A,0016) - Dose Reference Description.
   */
   static const std::string REFERENCE_DESCRIPTION_DOSE_PROPERTY_NAME;
 
   /**
       * Name of the property that encodes the optional string property holding the information from the tag (3004,000A) - Dose Summation Type.
       * This contains useful information for medical doctors
       */
   static const std::string DOSE_SUMMATION_TYPE_PROPERTY_NAME;
 
   /**
       * Name of the property that encodes the number of fractions.
       * It is for example in DICOM stored in tag (300A,0078) - Number of Fractions Prescribed (from the RTPLAN file if this file exists).
       * This value could be used to further scale the dose according to dose summation type.
       * For example a given plan consists of 8 fractions. Scaling the fraction dose by 8 gives the complete planned dose.
       */
   static const std::string DOSE_FRACTION_COUNT_PROPERTY_NAME;
 
   /**
   * Name of the property that encodes the number of beams.
   * It is for example in DICOM stored in tag (300A,0080) - Number of Beams (from the RTPLAN file if this file exists).
   */
   static const std::string DOSE_FRACTION_NUMBER_OF_BEAMS_PROPERTY_NAME;
   /**
   * Name of the property that encodes the radiation type of beams.
   * It is for example in DICOM stored in tag (300A,00C6) - Radiation Type (from the RTPLAN file if this file exists).
   */
   static const std::string DOSE_RADIATION_TYPE_PROPERTY_NAME;
 
   /**
       * Name of the property that encodes if the iso line rendering should be activated for the node.
       */
   static const std::string DOSE_SHOW_ISOLINES_PROPERTY_NAME;
 
   /**
       * Name of the property that encodes if the color wash rendering should be activated for the node.
       */
   static const std::string DOSE_SHOW_COLORWASH_PROPERTY_NAME;
 
   /**
       * Name of the property that encodes if the set of iso levels should be used to visualize the dose distribution.
       */
   static const std::string DOSE_ISO_LEVELS_PROPERTY_NAME;
 
   /**
       * Name of the property that encodes user defined iso values that mark special dose values in the distribution.
       */
   static const std::string DOSE_FREE_ISO_VALUES_PROPERTY_NAME;
 
 };
 }
 
+#ifdef _MSC_VER
+#  pragma warning(pop)
+#endif
+
 #endif