diff --git a/Modules/ROI/autoload/IO/src/mitkROIIOModuleActivator.h b/Modules/ROI/autoload/IO/src/mitkROIIOModuleActivator.h
index d5412c1c7f..d7c3378a01 100644
--- a/Modules/ROI/autoload/IO/src/mitkROIIOModuleActivator.h
+++ b/Modules/ROI/autoload/IO/src/mitkROIIOModuleActivator.h
@@ -1,35 +1,37 @@
 /*============================================================================
 
 The Medical Imaging Interaction Toolkit (MITK)
 
 Copyright (c) German Cancer Research Center (DKFZ)
 All rights reserved.
 
 Use of this source code is governed by a 3-clause BSD license that can be
 found in the LICENSE file.
 
 ============================================================================*/
 
 #include <usModuleActivator.h>
+
 #include <memory>
+#include <vector>
 
 namespace mitk
 {
   class AbstractFileIO;
 
   class ROIIOModuleActivator : public us::ModuleActivator
   {
   public:
     ROIIOModuleActivator() = default;
     ~ROIIOModuleActivator() override = default;
 
     ROIIOModuleActivator(const ROIIOModuleActivator&) = delete;
     ROIIOModuleActivator& operator=(const ROIIOModuleActivator&) = delete;
 
     void Load(us::ModuleContext* context) override;
     void Unload(us::ModuleContext*) override;
 
   private:
     std::vector<std::shared_ptr<AbstractFileIO>> m_FileIOs;
   };
 }