diff --git a/Modules/Multilabel/mitkLabelSetIOHelper.h b/Modules/Multilabel/mitkLabelSetIOHelper.h
index fb0463c3c8..a2e6a749c1 100644
--- a/Modules/Multilabel/mitkLabelSetIOHelper.h
+++ b/Modules/Multilabel/mitkLabelSetIOHelper.h
@@ -1,95 +1,96 @@
 /*===================================================================
 
 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 __mitkLabelSetIOHelper_h
 #define __mitkLabelSetIOHelper_h
 
 #include <itkSmartPointer.h>
+#include <MitkMultilabelExports.h>
 
 class TiXmlElement;
 
 namespace mitk {
 
 class BaseProperty;
 class LabelSetImage;
 class Label;
 
 /**
  * @brief The LabelSetIOHelper is a static helper class that supports serialization of mitk::LabelSetImage
  *
  * This class provides static functions for converting mitk::Label into XML and also allows the serialization
  * of mitk::LabelSet as presets
  */
-class LabelSetIOHelper
+class MITKMULTILABEL_EXPORT LabelSetIOHelper
 {
 
 public:
 
   /**
    * @brief Saves the mitk::LabelSet configuration of inputImage to presetFilename.
    * The preset is stored as "*.lsetp"
    * @param presetFilename the filename including the filesystem path
    * @param inputImage the input image from which the preset should be generated
    * @return true if the serialization was successful and false otherwise
    */
   static bool SaveLabelSetImagePreset(std::string & presetFilename, itk::SmartPointer<mitk::LabelSetImage> & inputImage);
 
   /**
    * @brief Loads an existing preset for a mitk::LabelSetImage from presetFilename and applies it to inputImage
    * @param presetFilename the filename of the preset including the filesystem path
    * @param inputImage the image to which the loaded preset will be applied
    */
   static void LoadLabelSetImagePreset(std::string &presetFilename, itk::SmartPointer<mitk::LabelSetImage> &inputImage);
 
   /**
    * @brief Creates a mitk::Label from a TiXmlElement
    * @param labelElem the xml element from which a mitk::Label will be created
    * @return the created mitk::Label
    */
   static itk::SmartPointer<mitk::Label> LoadLabelFromTiXmlDocument(TiXmlElement *labelElem);
 
   /**
    * @brief Creates a TiXmlElement from a mitk::Label
    * @param label the mitk::Label from which the xml element will be created
    * @return the created TiXmlElement
    */
   static TiXmlElement *GetLabelAsTiXmlElement(Label *label);
 
   /**
    * @brief Since a mitk::Label is basically a mitk::PropertyList this function coverts the label's properties into XML
    * @param key the property's key which will be used in the XML element
    * @param property the mitk::BaseProperty that should be converted
    * @return the created TiXmlElement
    */
   static TiXmlElement * PropertyToXmlElem( const std::string& key, const BaseProperty* property );
 
   /**
    * @brief Since a mitk::Label is basically a mitk::PropertyList this function coverts a XML element into a property
    * @param key the property's key
    * @param prop the mitk::BaseProperty that will be created
    * @param elem the XML elem from which the property will be created
    * @return true if the conversion was successful and false otherwise
    */
   static bool PropertyFromXmlElem(std::string& key, itk::SmartPointer<mitk::BaseProperty>& prop, TiXmlElement* elem);
 
 private:
   LabelSetIOHelper();
 
 };
 
 }
 
 #endif // __mitkLabelSetIOHelper_h