diff --git a/Modules/Core/include/mitkMimeType.h b/Modules/Core/include/mitkMimeType.h
index be5dad77fb..785409c9ea 100644
--- a/Modules/Core/include/mitkMimeType.h
+++ b/Modules/Core/include/mitkMimeType.h
@@ -1,102 +1,102 @@
 /*===================================================================
 
 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 MITKMIMETYPE_H
 #define MITKMIMETYPE_H
 
 #include <MitkCoreExports.h>
 
 #include <usSharedData.h>
 
 #include <vector>
 
 #ifdef _MSC_VER
 #pragma warning(push)
 #pragma warning(disable : 4251)
 #endif
 
 namespace mitk
 {
   class CustomMimeType;
 
   /**
    * @ingroup IO
    *
    * @brief The MimeType class represens a registered mime-type. It is an immutable wrapper for mitk::CustomMimeType
    * that makes memory handling easier by providing a stack-object for the user.
    *
    * If you want to register a new MimeType, use the CustomMimeType class instead. Wrapping will be performed for you
    * automatically.
    * In all other cases you should use mitk::MimeType when working with mime-types.
    */
   class MITKCORE_EXPORT MimeType
   {
   public:
     MimeType();
     MimeType(const MimeType &other);
     MimeType(const CustomMimeType &x, int rank, long id);
 
     ~MimeType();
 
     MimeType &operator=(const MimeType &other);
     bool operator==(const MimeType &other) const;
 
     bool operator<(const MimeType &other) const;
 
     /** @See mitk::CustomMimeType::GetName()*/
     std::string GetName() const;
 
     /** @See mitk::CustomMimeType::GetCategory()*/
     std::string GetCategory() const;
 
     /** @See mitk::CustomMimeType::GetExtensions()*/
     std::vector<std::string> GetExtensions() const;
 
     /** @See mitk::CustomMimeType::GetComment()*/
     std::string GetComment() const;
 
     /** @See mitk::CustomMimeType::GetFileNameWithoutExtension()*/
     std::string GetFilenameWithoutExtension(const std::string &path) const;
 
     /** @See mitk::CustomMimeType::AppliesTo()*/
     bool AppliesTo(const std::string &path) const;
 
     /** @See mitk::CustomMimeType::MatchesExtension()*/
     bool MatchesExtension(const std::string &path) const;
 
     /** @See mitk::CustomMimeType::IsValid()*/
     bool IsValid() const;
 
     /** @See mitk::CustomMimeType::Swap()*/
     void Swap(MimeType &m);
 
   private:
     struct Impl;
 
     // Use C++11 shared_ptr instead
     us::SharedDataPointer<const Impl> m_Data;
   };
 
-  void swap(MimeType &m1, MimeType &m2);
+  MITKCORE_EXPORT void swap(MimeType &m1, MimeType &m2);
 
-  std::ostream &operator<<(std::ostream &os, const MimeType &mimeType);
+  MITKCORE_EXPORT std::ostream &operator<<(std::ostream &os, const MimeType &mimeType);
 }
 
 #ifdef _MSC_VER
 #pragma warning(pop)
 #endif
 
 #endif // MITKMIMETYPE_H