diff --git a/kcmkwin/kwindecoration/preview.cpp b/kcmkwin/kwindecoration/preview.cpp
index 938cb2a154..1e95c6cbea 100644
--- a/kcmkwin/kwindecoration/preview.cpp
+++ b/kcmkwin/kwindecoration/preview.cpp
@@ -429,25 +429,11 @@ void KDecorationPreviewBridge::grabXServer( bool )
     {
     }
 
-void KDecorationPreviewBridge::repaintShadow()
-    {
-    }
-
 bool KDecorationPreviewBridge::compositingActive() const
     {
     return false;
     }
 
-bool KDecorationPreviewBridge::shadowsActive() const
-    {
-    return false;
-    }
-
-double KDecorationPreviewBridge::opacity() const
-    {
-    return 1.0;
-    }
-
 KDecorationPreviewOptions::KDecorationPreviewOptions()
     {
     customBorderSize = BordersCount; // invalid
diff --git a/kcmkwin/kwindecoration/preview.h b/kcmkwin/kwindecoration/preview.h
index abb695d515..13481dbb32 100644
--- a/kcmkwin/kwindecoration/preview.h
+++ b/kcmkwin/kwindecoration/preview.h
@@ -113,10 +113,7 @@ class KDecorationPreviewBridge
         virtual Qt::WFlags initialWFlags() const;
         virtual void grabXServer( bool grab );
 
-        virtual void repaintShadow();
         virtual bool compositingActive() const;
-        virtual bool shadowsActive() const;
-        virtual double opacity() const;
     private:
         KDecorationPreview* preview;
         bool active;
diff --git a/lib/kcommondecoration.h b/lib/kcommondecoration.h
index 509dffa2a9..456af6e13e 100644
--- a/lib/kcommondecoration.h
+++ b/lib/kcommondecoration.h
@@ -374,7 +374,6 @@ class KWIN_EXPORT KCommonDecorationUnstable
         KCommonDecorationUnstable(KDecorationBridge* bridge, KDecorationFactory* factory);
         virtual ~KCommonDecorationUnstable();
         bool compositingActive() const;
-        bool shadowsActive() const;
     };
 
 /**