diff --git a/frame/util/docksettings.cpp b/frame/util/docksettings.cpp
index 288fb19a1..ab9166c69 100644
--- a/frame/util/docksettings.cpp
+++ b/frame/util/docksettings.cpp
@@ -152,6 +152,12 @@ DockSettings::DockSettings(QWidget *parent)
     resetFrontendGeometry();
 }
 
+DockSettings &DockSettings::Instance()
+{
+    static DockSettings settings;
+    return settings;
+}
+
 const QSize DockSettings::panelSize() const
 {
     switch (m_position)
diff --git a/frame/util/docksettings.h b/frame/util/docksettings.h
index c5d8e9edc..9f310561f 100644
--- a/frame/util/docksettings.h
+++ b/frame/util/docksettings.h
@@ -57,7 +57,7 @@ class DockSettings : public QObject
     Q_OBJECT
 
 public:
-    explicit DockSettings(QWidget *parent = 0);
+    static DockSettings& Instance();
 
     inline DisplayMode displayMode() const { return m_displayMode; }
     inline HideMode hideMode() const { return m_hideMode; }
@@ -106,6 +106,10 @@ private slots:
     void updateForbidPostions();
 
 private:
+    DockSettings(QWidget *parent = 0);
+    DockSettings(DockSettings const &) = delete;
+    DockSettings operator =(DockSettings const &) = delete;
+
     bool test(const Position pos, const QList<QRect> &otherScreens) const;
     void calculateWindowConfig();
     void gtkIconThemeChanged();
diff --git a/frame/window/mainwindow.cpp b/frame/window/mainwindow.cpp
index f9482bcc2..ccb1780bd 100644
--- a/frame/window/mainwindow.cpp
+++ b/frame/window/mainwindow.cpp
@@ -103,7 +103,7 @@ MainWindow::MainWindow(QWidget *parent)
     m_platformWindowHandle.setShadowOffset(QPoint(0, 0));
     m_platformWindowHandle.setShadowRadius(0);
 
-    m_settings = new DockSettings(this);
+    m_settings = &DockSettings::Instance();
     m_xcbMisc->set_window_type(winId(), XcbMisc::Dock);
 
     initComponents();