diff --git a/effects/fallapart/fallapart.cpp b/effects/fallapart/fallapart.cpp
index 7dd895d07b..8e3c0e7758 100644
--- a/effects/fallapart/fallapart.cpp
+++ b/effects/fallapart/fallapart.cpp
@@ -28,6 +28,17 @@ namespace KWin
 
 KWIN_EFFECT( fallapart, FallApartEffect )
 
+FallApartEffect::FallApartEffect()
+    {
+    reconfigure( ReconfigureAll );
+    }
+
+void FallApartEffect::reconfigure( ReconfigureFlags )
+    {
+    KConfigGroup conf = effects->effectConfig( "FallApart" );
+    blockSize = qBound( 1, conf.readEntry( "BlockSize", 40 ), 100000 );
+    }
+
 void FallApartEffect::prePaintScreen( ScreenPrePaintData& data, int time )
     {
     if( !windows.isEmpty())
@@ -45,7 +56,7 @@ void FallApartEffect::prePaintWindow( EffectWindow* w, WindowPrePaintData& data,
             data.setTransformed();
             w->enablePainting( EffectWindow::PAINT_DISABLED_BY_DELETE );
             // Request the window to be divided into cells
-            data.quads = data.quads.makeGrid( 40 );
+            data.quads = data.quads.makeGrid( blockSize );
             }
         else
             {
diff --git a/effects/fallapart/fallapart.h b/effects/fallapart/fallapart.h
index 24e988c197..5bdce5e242 100644
--- a/effects/fallapart/fallapart.h
+++ b/effects/fallapart/fallapart.h
@@ -30,6 +30,8 @@ class FallApartEffect
     : public Effect
     {
     public:
+        FallApartEffect();
+        virtual void reconfigure( ReconfigureFlags );
         virtual void prePaintScreen( ScreenPrePaintData& data, int time );
         virtual void prePaintWindow( EffectWindow* w, WindowPrePaintData& data, int time );
         virtual void paintWindow( EffectWindow* w, int mask, QRegion region, WindowPaintData& data );
@@ -39,7 +41,7 @@ class FallApartEffect
     private:
         QHash< const EffectWindow*, double > windows;
         bool isRealWindow ( EffectWindow* w );
-
+        int blockSize;
     };
 
 } // namespace