diff --git a/Modules/ContourModel/IO/mitkContourModelSetWriter.cpp b/Modules/ContourModel/IO/mitkContourModelSetWriter.cpp
index 0179b87246..23bc44a49f 100644
--- a/Modules/ContourModel/IO/mitkContourModelSetWriter.cpp
+++ b/Modules/ContourModel/IO/mitkContourModelSetWriter.cpp
@@ -1,86 +1,88 @@
 /*===================================================================
 
 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.
 
 ===================================================================*/
 
 #include "mitkContourModelSetWriter.h"
 #include "mitkContourModelWriter.h"
 #include <mitkCustomMimeType.h>
+#include <iostream>
+#include <fstream>
 
 mitk::ContourModelSetWriter::ContourModelSetWriter()
   : AbstractFileWriter(ContourModelSet::GetStaticNameOfClass())
 {
   std::string category = "ContourModelSet File";
   mitk::CustomMimeType customMimeType;
   customMimeType.SetCategory(category);
   customMimeType.AddExtension("cnt_set");
 
   this->SetDescription(category);
   this->SetMimeType(customMimeType);
 
   RegisterService();
 }
 
 mitk::ContourModelSetWriter::ContourModelSetWriter(const mitk::ContourModelSetWriter& other)
   : AbstractFileWriter(other)
 {
 }
 
 mitk::ContourModelSetWriter::~ContourModelSetWriter()
 {}
 
 void mitk::ContourModelSetWriter::Write()
 {
   std::ostream* out;
   std::ofstream outStream;
 
   if( this->GetOutputStream() )
   {
     out = this->GetOutputStream();
   }
   else
   {
     outStream.open( this->GetOutputLocation().c_str() );
     out = &outStream;
   }
 
   if ( !out->good() )
   {
     mitkThrow() << "Stream not good.";
   }
 
   //Use regular ContourModel writer to write each contour of the set to a single file.
   //Just use a different file extension .cnt_set
 
   mitk::ContourModelWriter writer;
 
   mitk::ContourModelSet::ConstPointer contourModelSet = dynamic_cast<const mitk::ContourModelSet*>(this->GetInput());
 
   //
   // for each contour object set input of writer
   //
   for ( int i = 0 ; i < contourModelSet->GetSize(); ++i )
   {
     const mitk::ContourModel* contour = contourModelSet->GetContourModelAt(i);
     writer.SetInput( contour );
     writer.SetOutputStream( this->GetOutputLocation(), out );
     writer.Write();
   }
 
 }
 
 mitk::ContourModelSetWriter* mitk::ContourModelSetWriter::Clone() const
 {
   return new ContourModelSetWriter(*this);
 }