diff --git a/kdecoration/breezebutton.h b/kdecoration/breezebutton.h
--- a/kdecoration/breezebutton.h
+++ b/kdecoration/breezebutton.h
@@ -93,7 +93,7 @@
             update();
         }
 
-        qreal opacity( void ) const
+        qreal opacity() const
         { return m_opacity; }
 
         //@}
@@ -116,8 +116,8 @@
 
         //*@name colors
         //@{
-        QColor foregroundColor( void ) const;
-        QColor backgroundColor( void ) const;
+        QColor foregroundColor() const;
+        QColor backgroundColor() const;
         //@}
 
         Flag m_flag = FlagNone;
diff --git a/kdecoration/breezebutton.cpp b/kdecoration/breezebutton.cpp
--- a/kdecoration/breezebutton.cpp
+++ b/kdecoration/breezebutton.cpp
@@ -353,7 +353,7 @@
     }
 
     //__________________________________________________________________
-    QColor Button::foregroundColor( void ) const
+    QColor Button::foregroundColor() const
     {
         auto d = qobject_cast<Decoration*>( decoration() );
         if( !d ) {
@@ -389,7 +389,7 @@
     }
 
     //__________________________________________________________________
-    QColor Button::backgroundColor( void ) const
+    QColor Button::backgroundColor() const
     {
         auto d = qobject_cast<Decoration*>( decoration() );
         if( !d ) {
diff --git a/kdecoration/breezedecoration.h b/kdecoration/breezedecoration.h
--- a/kdecoration/breezedecoration.h
+++ b/kdecoration/breezedecoration.h
@@ -74,30 +74,30 @@
         //@{
         void setOpacity( qreal );
 
-        qreal opacity( void ) const
+        qreal opacity() const
         { return m_opacity; }
 
         //@}
 
         //*@name colors
         //@{
-        QColor titleBarColor( void ) const;
-        QColor outlineColor( void ) const;
-        QColor fontColor( void ) const;
+        QColor titleBarColor() const;
+        QColor outlineColor() const;
+        QColor fontColor() const;
         //@}
 
         //*@name maximization modes
         //@{
-        inline bool isMaximized( void ) const;
-        inline bool isMaximizedHorizontally( void ) const;
-        inline bool isMaximizedVertically( void ) const;
+        inline bool isMaximized() const;
+        inline bool isMaximizedHorizontally() const;
+        inline bool isMaximizedVertically() const;
 
-        inline bool isLeftEdge( void ) const;
-        inline bool isRightEdge( void ) const;
-        inline bool isTopEdge( void ) const;
-        inline bool isBottomEdge( void ) const;
+        inline bool isLeftEdge() const;
+        inline bool isRightEdge() const;
+        inline bool isTopEdge() const;
+        inline bool isBottomEdge() const;
 
-        inline bool hideTitleBar( void ) const;
+        inline bool hideTitleBar() const;
         //@}
 
         public Q_SLOTS:
@@ -115,25 +115,25 @@
         private:
 
         //* return the rect in which caption will be drawn
-        QPair<QRect,Qt::Alignment> captionRect( void ) const;
+        QPair<QRect,Qt::Alignment> captionRect() const;
 
         void createButtons();
         void paintTitleBar(QPainter *painter, const QRect &repaintRegion);
         void createShadow();
 
         //*@name border size
         //@{
         int borderSize(bool bottom = false) const;
-        inline bool hasBorders( void ) const;
-        inline bool hasNoBorders( void ) const;
-        inline bool hasNoSideBorders( void ) const;
+        inline bool hasBorders() const;
+        inline bool hasNoBorders() const;
+        inline bool hasNoSideBorders() const;
         //@}
 
         //*@name size grip
         //@{
-        void createSizeGrip( void );
-        void deleteSizeGrip( void );
-        SizeGrip* sizeGrip( void ) const
+        void createSizeGrip();
+        void deleteSizeGrip();
+        SizeGrip* sizeGrip() const
         { return m_sizeGrip; }
         //@}
 
@@ -153,46 +153,46 @@
 
     };
 
-    bool Decoration::hasBorders( void ) const
+    bool Decoration::hasBorders() const
     {
         if( m_internalSettings && m_internalSettings->mask() & BorderSize ) return m_internalSettings->borderSize() > InternalSettings::BorderNoSides;
         else return settings()->borderSize() > KDecoration2::BorderSize::NoSides;
     }
 
-    bool Decoration::hasNoBorders( void ) const
+    bool Decoration::hasNoBorders() const
     {
         if( m_internalSettings && m_internalSettings->mask() & BorderSize ) return m_internalSettings->borderSize() == InternalSettings::BorderNone;
         else return settings()->borderSize() == KDecoration2::BorderSize::None;
     }
 
-    bool Decoration::hasNoSideBorders( void ) const
+    bool Decoration::hasNoSideBorders() const
     {
         if( m_internalSettings && m_internalSettings->mask() & BorderSize ) return m_internalSettings->borderSize() == InternalSettings::BorderNoSides;
         else return settings()->borderSize() == KDecoration2::BorderSize::NoSides;
     }
 
-    bool Decoration::isMaximized( void ) const
+    bool Decoration::isMaximized() const
     { return client().data()->isMaximized() && !m_internalSettings->drawBorderOnMaximizedWindows(); }
 
-    bool Decoration::isMaximizedHorizontally( void ) const
+    bool Decoration::isMaximizedHorizontally() const
     { return client().data()->isMaximizedHorizontally() && !m_internalSettings->drawBorderOnMaximizedWindows(); }
 
-    bool Decoration::isMaximizedVertically( void ) const
+    bool Decoration::isMaximizedVertically() const
     { return client().data()->isMaximizedVertically() && !m_internalSettings->drawBorderOnMaximizedWindows(); }
 
-    bool Decoration::isLeftEdge( void ) const
+    bool Decoration::isLeftEdge() const
     { return (client().data()->isMaximizedHorizontally() || client().data()->adjacentScreenEdges().testFlag( Qt::LeftEdge ) ) && !m_internalSettings->drawBorderOnMaximizedWindows(); }
 
-    bool Decoration::isRightEdge( void ) const
+    bool Decoration::isRightEdge() const
     { return (client().data()->isMaximizedHorizontally() || client().data()->adjacentScreenEdges().testFlag( Qt::RightEdge ) ) && !m_internalSettings->drawBorderOnMaximizedWindows(); }
 
-    bool Decoration::isTopEdge( void ) const
+    bool Decoration::isTopEdge() const
     { return (client().data()->isMaximizedVertically() || client().data()->adjacentScreenEdges().testFlag( Qt::TopEdge ) ) && !m_internalSettings->drawBorderOnMaximizedWindows(); }
 
-    bool Decoration::isBottomEdge( void ) const
+    bool Decoration::isBottomEdge() const
     { return (client().data()->isMaximizedVertically() || client().data()->adjacentScreenEdges().testFlag( Qt::BottomEdge ) ) && !m_internalSettings->drawBorderOnMaximizedWindows(); }
 
-    bool Decoration::hideTitleBar( void ) const
+    bool Decoration::hideTitleBar() const
     { return m_internalSettings->hideTitleBar() && !client().data()->isShaded(); }
 
 }
diff --git a/kdecoration/breezedecoration.cpp b/kdecoration/breezedecoration.cpp
--- a/kdecoration/breezedecoration.cpp
+++ b/kdecoration/breezedecoration.cpp
@@ -724,7 +724,7 @@
     }
 
     //_________________________________________________________________
-    void Decoration::createSizeGrip( void )
+    void Decoration::createSizeGrip()
     {
 
         // do nothing if size grip already exist
@@ -749,7 +749,7 @@
     }
 
     //_________________________________________________________________
-    void Decoration::deleteSizeGrip( void )
+    void Decoration::deleteSizeGrip()
     {
         if( m_sizeGrip )
         {
diff --git a/kdecoration/breezesettingsprovider.h b/kdecoration/breezesettingsprovider.h
--- a/kdecoration/breezesettingsprovider.h
+++ b/kdecoration/breezesettingsprovider.h
@@ -50,12 +50,12 @@
         public Q_SLOTS:
 
         //* reconfigure
-        void reconfigure( void );
+        void reconfigure();
 
         private:
 
         //* contructor
-        SettingsProvider( void );
+        SettingsProvider();
 
         //* default configuration
         InternalSettingsPtr m_defaultSettings;
diff --git a/kdecoration/breezesettingsprovider.cpp b/kdecoration/breezesettingsprovider.cpp
--- a/kdecoration/breezesettingsprovider.cpp
+++ b/kdecoration/breezesettingsprovider.cpp
@@ -51,7 +51,7 @@
     }
 
     //__________________________________________________________________
-    void SettingsProvider::reconfigure( void )
+    void SettingsProvider::reconfigure()
     {
         if( !m_defaultSettings )
         {
diff --git a/kdecoration/breezesizegrip.h b/kdecoration/breezesizegrip.h
--- a/kdecoration/breezesizegrip.h
+++ b/kdecoration/breezesizegrip.h
@@ -47,18 +47,18 @@
         explicit SizeGrip( Decoration* );
 
         //* constructor
-        virtual ~SizeGrip( void );
+        virtual ~SizeGrip();
 
         protected Q_SLOTS:
 
         //* update background color
-        void updateActiveState( void );
+        void updateActiveState();
 
         //* update position
-        void updatePosition( void );
+        void updatePosition();
 
         //* embed into parent widget
-        void embed( void );
+        void embed();
 
         protected:
 
diff --git a/kdecoration/breezesizegrip.cpp b/kdecoration/breezesizegrip.cpp
--- a/kdecoration/breezesizegrip.cpp
+++ b/kdecoration/breezesizegrip.cpp
@@ -75,11 +75,11 @@
     }
 
     //_____________________________________________
-    SizeGrip::~SizeGrip( void )
+    SizeGrip::~SizeGrip()
     {}
 
     //_____________________________________________
-    void SizeGrip::updateActiveState( void )
+    void SizeGrip::updateActiveState()
     {
         #if BREEZE_HAVE_X11
         if( QX11Info::isPlatformX11() )
@@ -95,7 +95,7 @@
     }
 
     //_____________________________________________
-    void SizeGrip::embed( void )
+    void SizeGrip::embed()
     {
 
         #if BREEZE_HAVE_X11
@@ -190,7 +190,7 @@
     }
 
     //_______________________________________________________________________________
-    void SizeGrip::updatePosition( void )
+    void SizeGrip::updatePosition()
     {
 
         #if BREEZE_HAVE_X11
diff --git a/kdecoration/config/breezeconfigwidget.h b/kdecoration/config/breezeconfigwidget.h
--- a/kdecoration/config/breezeconfigwidget.h
+++ b/kdecoration/config/breezeconfigwidget.h
@@ -51,16 +51,16 @@
         explicit ConfigWidget( QWidget*, const QVariantList& );
 
         //* destructor
-        virtual ~ConfigWidget( void ) = default;
+        virtual ~ConfigWidget() = default;
 
         //* default
         void defaults() override;
 
         //* load configuration
-        void load( void ) override;
+        void load() override;
 
         //* save configuration
-        void save( void ) override;
+        void save() override;
 
         protected Q_SLOTS:
 
diff --git a/kdecoration/config/breezeconfigwidget.cpp b/kdecoration/config/breezeconfigwidget.cpp
--- a/kdecoration/config/breezeconfigwidget.cpp
+++ b/kdecoration/config/breezeconfigwidget.cpp
@@ -69,7 +69,7 @@
     }
 
     //_________________________________________________________
-    void ConfigWidget::load( void )
+    void ConfigWidget::load()
     {
 
         // create internal settings and load from rc files
@@ -103,7 +103,7 @@
     }
 
     //_________________________________________________________
-    void ConfigWidget::save( void )
+    void ConfigWidget::save()
     {
 
         // create internal settings and load from rc files
@@ -151,7 +151,7 @@
     }
 
     //_________________________________________________________
-    void ConfigWidget::defaults( void )
+    void ConfigWidget::defaults()
     {
 
         // create internal settings and load from rc files
@@ -175,7 +175,7 @@
     }
 
     //_______________________________________________
-    void ConfigWidget::updateChanged( void )
+    void ConfigWidget::updateChanged()
     {
 
         // check configuration
diff --git a/kdecoration/config/breezedetectwidget.h b/kdecoration/config/breezedetectwidget.h
--- a/kdecoration/config/breezedetectwidget.h
+++ b/kdecoration/config/breezedetectwidget.h
@@ -92,7 +92,7 @@
         WId findWindow();
 
         //* execute
-        void executeDialog( void );
+        void executeDialog();
 
         //* ui
         Ui::BreezeDetectWidget m_ui;
diff --git a/kdecoration/config/breezeexceptiondialog.h b/kdecoration/config/breezeexceptiondialog.h
--- a/kdecoration/config/breezeexceptiondialog.h
+++ b/kdecoration/config/breezeexceptiondialog.h
@@ -48,17 +48,17 @@
         explicit ExceptionDialog( QWidget* parent );
 
         //* destructor
-        virtual ~ExceptionDialog( void )
+        virtual ~ExceptionDialog()
         {}
 
         //* set exception
         void setException( InternalSettingsPtr );
 
         //* save exception
-        void save( void );
+        void save();
 
         //* true if changed
-        virtual bool isChanged( void ) const
+        virtual bool isChanged() const
         { return m_changed; }
 
         Q_SIGNALS:
@@ -83,7 +83,7 @@
         private Q_SLOTS:
 
         //* select window properties from grabbed pointers
-        void selectWindowProperties( void );
+        void selectWindowProperties();
 
         //* read properties of selected window
         void readWindowProperties( bool );
diff --git a/kdecoration/config/breezeexceptiondialog.cpp b/kdecoration/config/breezeexceptiondialog.cpp
--- a/kdecoration/config/breezeexceptiondialog.cpp
+++ b/kdecoration/config/breezeexceptiondialog.cpp
@@ -89,7 +89,7 @@
     }
 
     //___________________________________________
-    void ExceptionDialog::save( void )
+    void ExceptionDialog::save()
     {
         m_exception->setExceptionType( m_ui.exceptionType->currentIndex() );
         m_exception->setExceptionPattern( m_ui.exceptionEditor->text() );
@@ -108,7 +108,7 @@
     }
 
     //___________________________________________
-    void ExceptionDialog::updateChanged( void )
+    void ExceptionDialog::updateChanged()
     {
         bool modified( false );
         if( m_exception->exceptionType() != m_ui.exceptionType->currentIndex() ) modified = true;
@@ -133,7 +133,7 @@
     }
 
     //___________________________________________
-    void ExceptionDialog::selectWindowProperties( void )
+    void ExceptionDialog::selectWindowProperties()
     {
 
         // create widget
diff --git a/kdecoration/config/breezeexceptionlistwidget.h b/kdecoration/config/breezeexceptionlistwidget.h
--- a/kdecoration/config/breezeexceptionlistwidget.h
+++ b/kdecoration/config/breezeexceptionlistwidget.h
@@ -47,10 +47,10 @@
         void setExceptions( const InternalSettingsList& );
 
         //* get exceptions
-        InternalSettingsList exceptions( void );
+        InternalSettingsList exceptions();
 
         //* true if changed
-        virtual bool isChanged( void ) const
+        virtual bool isChanged() const
         { return m_changed; }
 
         Q_SIGNALS:
@@ -71,30 +71,30 @@
         protected Q_SLOTS:
 
         //* update button states
-        virtual void updateButtons( void );
+        virtual void updateButtons();
 
         //* add
-        virtual void add( void );
+        virtual void add();
 
         //* edit
-        virtual void edit( void );
+        virtual void edit();
 
         //* remove
-        virtual void remove( void );
+        virtual void remove();
 
         //* toggle
         virtual void toggle( const QModelIndex& );
 
         //* move up
-        virtual void up( void );
+        virtual void up();
 
         //* move down
-        virtual void down( void );
+        virtual void down();
 
         protected:
 
         //* resize columns
-        void resizeColumns( void ) const;
+        void resizeColumns() const;
 
         //* check exception
         bool checkException( InternalSettingsPtr );
diff --git a/kdecoration/config/breezeexceptionlistwidget.cpp b/kdecoration/config/breezeexceptionlistwidget.cpp
--- a/kdecoration/config/breezeexceptionlistwidget.cpp
+++ b/kdecoration/config/breezeexceptionlistwidget.cpp
@@ -83,14 +83,14 @@
     }
 
     //__________________________________________________________
-    InternalSettingsList ExceptionListWidget::exceptions( void )
+    InternalSettingsList ExceptionListWidget::exceptions()
     {
         return model().get();
         setChanged( false );
     }
 
     //__________________________________________________________
-    void ExceptionListWidget::updateButtons( void )
+    void ExceptionListWidget::updateButtons()
     {
 
         bool hasSelection( !m_ui.exceptionListView->selectionModel()->selectedRows().empty() );
@@ -104,7 +104,7 @@
 
 
     //_______________________________________________________
-    void ExceptionListWidget::add( void )
+    void ExceptionListWidget::add()
     {
 
 
@@ -147,7 +147,7 @@
     }
 
     //_______________________________________________________
-    void ExceptionListWidget::edit( void )
+    void ExceptionListWidget::edit()
     {
 
         // retrieve selection
@@ -186,7 +186,7 @@
     }
 
     //_______________________________________________________
-    void ExceptionListWidget::remove( void )
+    void ExceptionListWidget::remove()
     {
 
         // confirmation dialog
@@ -224,7 +224,7 @@
     }
 
     //_______________________________________________________
-    void ExceptionListWidget::up( void )
+    void ExceptionListWidget::up()
     {
 
         InternalSettingsList selection( model().get( m_ui.exceptionListView->selectionModel()->selectedRows() ) );
@@ -270,7 +270,7 @@
     }
 
     //_______________________________________________________
-    void ExceptionListWidget::down( void )
+    void ExceptionListWidget::down()
     {
 
         InternalSettingsList selection( model().get( m_ui.exceptionListView->selectionModel()->selectedRows() ) );
@@ -322,7 +322,7 @@
     }
 
     //_______________________________________________________
-    void ExceptionListWidget::resizeColumns( void ) const
+    void ExceptionListWidget::resizeColumns() const
     {
         m_ui.exceptionListView->resizeColumnToContents( ExceptionModel::ColumnEnabled );
         m_ui.exceptionListView->resizeColumnToContents( ExceptionModel::ColumnType );
diff --git a/kdecoration/config/breezeitemmodel.h b/kdecoration/config/breezeitemmodel.h
--- a/kdecoration/config/breezeitemmodel.h
+++ b/kdecoration/config/breezeitemmodel.h
@@ -51,26 +51,26 @@
         //@{
 
         //* sort
-        virtual void sort( void )
+        virtual void sort()
         { sort( sortColumn(), sortOrder() ); }
 
         //* sort
         void sort( int column, Qt::SortOrder order = Qt::AscendingOrder ) override;
 
         //* current sorting column
-        const int& sortColumn( void ) const
+        const int& sortColumn() const
         { return m_sortColumn; }
 
         //* current sort order
-        const Qt::SortOrder& sortOrder( void ) const
+        const Qt::SortOrder& sortOrder() const
         { return m_sortOrder; }
 
         //@}
 
         protected:
 
         //* this sort columns without calling the layout changed callbacks
-        void privateSort( void )
+        void privateSort()
         { privateSort( m_sortColumn, m_sortOrder ); }
 
         //* private sort, with no signals emmitted
diff --git a/kdecoration/config/breezelistmodel.h b/kdecoration/config/breezelistmodel.h
--- a/kdecoration/config/breezelistmodel.h
+++ b/kdecoration/config/breezelistmodel.h
@@ -105,7 +105,7 @@
         //@{
 
         //! clear internal list selected items
-        virtual void clearSelectedIndexes( void )
+        virtual void clearSelectedIndexes()
         { _selection.clear(); }
 
         //! store index internal selection state
@@ -116,7 +116,7 @@
         }
 
         //! get list of internal selected items
-        virtual QModelIndexList selectedIndexes( void ) const
+        virtual QModelIndexList selectedIndexes() const
         {
 
             QModelIndexList out;
@@ -228,7 +228,7 @@
         }
 
         //! clear
-        virtual void clear( void )
+        virtual void clear()
         { set( List() ); }
 
         //! update values from list
diff --git a/kstyle/breezeblurhelper.h b/kstyle/breezeblurhelper.h
--- a/kstyle/breezeblurhelper.h
+++ b/kstyle/breezeblurhelper.h
@@ -53,7 +53,7 @@
         BlurHelper( QObject* );
 
         //! destructor
-        virtual ~BlurHelper( void )
+        virtual ~BlurHelper()
         {}
 
         //! register widget