diff --git a/Modules/Core/include/mitkOperation.h b/Modules/Core/include/mitkOperation.h
index afbddc4d3d..3af339efa6 100644
--- a/Modules/Core/include/mitkOperation.h
+++ b/Modules/Core/include/mitkOperation.h
@@ -1,69 +1,71 @@
 /*===================================================================
 
 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 OPERATION_H_HEADER_INCLUDED_C16E7D9E
 #define OPERATION_H_HEADER_INCLUDED_C16E7D9E
 
 #include <MitkCoreExports.h>
 #include <itkEventObject.h>
 
+#include <itkMacro.h>
+
 namespace mitk {
 typedef int OperationType ;
 
 //##Documentation
 //## @brief Base class of all Operation-classes
 //##
 //## @ingroup Undo
 class MITKCORE_EXPORT Operation
 {
 public:
   itkTypeMacroNoParent(Operation)
 
   //##Documentation
   //## Constructor
   Operation(OperationType operationType);
 
   virtual ~Operation();
 
   OperationType GetOperationType();
 
   protected:
   OperationType m_OperationType;
 };
 
 class MITKCORE_EXPORT OperationEndEvent : public itk::EndEvent
 {
 public:
   typedef OperationEndEvent Self;
   typedef itk::EndEvent Superclass;
   OperationEndEvent(Operation* operation = NULL) :
     m_Operation(operation) {}
   virtual ~OperationEndEvent() {}
   virtual const char * GetEventName() const { return "OperationEndEvent"; }
   virtual bool CheckEvent(const ::itk::EventObject* e) const
     { return dynamic_cast<const Self*>(e); }
   virtual ::itk::EventObject* MakeObject() const
     { return new Self(m_Operation); }
   Operation* GetOperation() const { return m_Operation; }
 private:
   Operation* m_Operation;
   OperationEndEvent(const Self&);
   void operator=(const Self&);
 };
 
 }//namespace mitk
 #endif /* OPERATION_H_HEADER_INCLUDED_C16E7D9E */