diff --git a/Modules/QtWidgets/include/QmitkMemoryUsageIndicatorView.h b/Modules/QtWidgets/include/QmitkMemoryUsageIndicatorView.h
index 9eb9a0514c..b050374394 100644
--- a/Modules/QtWidgets/include/QmitkMemoryUsageIndicatorView.h
+++ b/Modules/QtWidgets/include/QmitkMemoryUsageIndicatorView.h
@@ -1,49 +1,48 @@
 /*============================================================================
 
 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.
 
 ============================================================================*/
 
 #ifndef QmitkMemoryUsageIndicatorView_h
 #define QmitkMemoryUsageIndicatorView_h
 
 #include <MitkQtWidgetsExports.h>
 
 #include <QWidget>
 
 #include <array>
 #include <utility>
 
 namespace Ui
 {
   class QmitkMemoryUsageIndicator;
 }
 
 /// \ingroup QmitkModule
 class MITKQTWIDGETS_EXPORT QmitkMemoryUsageIndicatorView : public QWidget
 {
   Q_OBJECT
 
 public:
   QmitkMemoryUsageIndicatorView(QWidget* parent = nullptr);
   ~QmitkMemoryUsageIndicatorView() override;
 
 private:
   void UpdateMemoryUsage();
   std::string FormatMemorySize(size_t size);
   std::string FormatPercentage(double val);
   std::string GetMemoryDescription(size_t processSize, float percentage);
 
-  static std::array<std::pair<float, QPixmap>, 4> s_States;
-
   Ui::QmitkMemoryUsageIndicator* m_Ui;
   size_t m_PreviousState;
+  std::array<std::pair<float, QPixmap>, 4> m_States;
 };
 
 #endif
diff --git a/Modules/QtWidgets/src/QmitkMemoryUsageIndicatorView.cpp b/Modules/QtWidgets/src/QmitkMemoryUsageIndicatorView.cpp
index 8f58e4fc00..3ea50ac3f6 100644
--- a/Modules/QtWidgets/src/QmitkMemoryUsageIndicatorView.cpp
+++ b/Modules/QtWidgets/src/QmitkMemoryUsageIndicatorView.cpp
@@ -1,131 +1,130 @@
 /*============================================================================
 
 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.
 
 ============================================================================*/
 
 /****************************************************************************
 ** ui.h extension file, included from the uic-generated form implementation.
 **
 ** If you want to add, delete, or rename functions or slots, use
 ** Qt Designer to update this file, preserving your code.
 **
 ** You should not define a constructor or destructor in this file.
 ** Instead, write your code in functions called init() and destroy().
 ** These will automatically be called by the form's constructor and
 ** destructor.
 *****************************************************************************/
 
 #include <QmitkMemoryUsageIndicatorView.h>
 
 #include <mitkMemoryUtilities.h>
 
 #include <iomanip>
 
 #include <QTimer>
 
 #include <QmitkMemoryUsageIndicatorImagesGreen.xpm>
 #include <QmitkMemoryUsageIndicatorImagesOrange.xpm>
 #include <QmitkMemoryUsageIndicatorImagesRed.xpm>
 #include <QmitkMemoryUsageIndicatorImagesYellow.xpm>
 
 #include <ui_QmitkMemoryUsageIndicator.h>
 
-std::array<std::pair<float, QPixmap>, 4> QmitkMemoryUsageIndicatorView::s_States = {
-  std::make_pair(0.0f, QPixmap(QmitkMemoryUsageIndicatorImagesGreen_xpm)),
-  std::make_pair(50.0f, QPixmap(QmitkMemoryUsageIndicatorImagesYellow_xpm)),
-  std::make_pair(65.0f, QPixmap(QmitkMemoryUsageIndicatorImagesOrange_xpm)),
-  std::make_pair(85.0f, QPixmap(QmitkMemoryUsageIndicatorImagesRed_xpm))
-};
-
 QmitkMemoryUsageIndicatorView::QmitkMemoryUsageIndicatorView(QWidget*)
   : m_Ui(new Ui::QmitkMemoryUsageIndicator),
-    m_PreviousState(0)
+    m_PreviousState(0),
+    m_States {
+      std::make_pair(0.0f, QPixmap(QmitkMemoryUsageIndicatorImagesGreen_xpm)),
+      std::make_pair(50.0f, QPixmap(QmitkMemoryUsageIndicatorImagesYellow_xpm)),
+      std::make_pair(65.0f, QPixmap(QmitkMemoryUsageIndicatorImagesOrange_xpm)),
+      std::make_pair(85.0f, QPixmap(QmitkMemoryUsageIndicatorImagesRed_xpm))
+    }
 {
   m_Ui->setupUi(this);
-  m_Ui->led->setPixmap(s_States[0].second);
+  m_Ui->led->setPixmap(m_States[0].second);
 
   auto timer = new QTimer(this);
   connect(timer, &QTimer::timeout, this, &QmitkMemoryUsageIndicatorView::UpdateMemoryUsage);
   timer->start(1000);
 }
 
 QmitkMemoryUsageIndicatorView::~QmitkMemoryUsageIndicatorView()
 {
 }
 
 void QmitkMemoryUsageIndicatorView::UpdateMemoryUsage()
 {
   size_t processSize = mitk::MemoryUtilities::GetProcessMemoryUsage();
   size_t totalSize = mitk::MemoryUtilities::GetTotalSizeOfPhysicalRam();
   float percentage = static_cast<float>(processSize) / totalSize * 100.0f;
 
   m_Ui->label->setText(QString::fromStdString(this->GetMemoryDescription(processSize, percentage)));
 
-  for (size_t i = s_States.size() - 1; i >= 0; --i)
+  for (size_t i = m_States.size() - 1; i >= 0; --i)
   {
-    if (percentage >= s_States[i].first)
+    if (percentage >= m_States[i].first)
     {
       if (m_PreviousState != i)
       {
-        m_Ui->led->setPixmap(s_States[i].second);
+        m_Ui->led->setPixmap(m_States[i].second);
         m_PreviousState = i;
       }
 
       break;
     }
   }
 }
 
 std::string QmitkMemoryUsageIndicatorView::FormatMemorySize(size_t size)
 {
   double val = size;
   std::string unit;
 
   if (val >= 1024.0)
   {
     val /= 1024.0;
     unit = "K";
   }
 
   if (val >= 1024.0)
   {
     val /= 1024.0;
     unit = "M";
   }
 
   if (val >= 1024.0)
   {
     val /= 1024.0;
     unit = "G";
   }
 
   unit += "B";
 
   std::ostringstream str;
   str.imbue(std::locale::classic());
   str << std::fixed << std::setprecision(2) << val << " " << unit;
   return str.str();
 }
 
 std::string QmitkMemoryUsageIndicatorView::FormatPercentage(double val)
 {
   std::ostringstream str;
   str.imbue(std::locale::classic());
   str << std::fixed << std::setprecision(2) << val << " " << "%";
   return str.str();
 }
 
 std::string QmitkMemoryUsageIndicatorView::GetMemoryDescription(size_t processSize, float percentage)
 {
   std::ostringstream str;
   str.imbue(std::locale::classic());
   str << FormatMemorySize(processSize) << " (" << FormatPercentage(percentage) << ")";
   return str.str();
 }