diff --git a/effects/sphere.cpp b/effects/sphere.cpp
index 31841a8a51..725f9445f9 100644
--- a/effects/sphere.cpp
+++ b/effects/sphere.cpp
@@ -47,6 +47,7 @@ SphereEffect::SphereEffect()
     animateDesktopChange = false;
     KConfigGroup conf = effects->effectConfig( "Sphere" );
     zPosition = conf.readEntry( "ZPosition", 450.0 );
+    capDeformationFactor = conf.readEntry( "CapDeformation", 0 )/100.0f;
     bigCube = true;
     }
 
@@ -173,7 +174,9 @@ void SphereEffect::paintCapStep( float z, float zTexture, bool texture )
         float topAngle = angle*i*M_PI/180.0;
         float bottomAngle = angle*(i+1)*M_PI/180.0;
         float yTop = rect.height() - radius * cos( topAngle );
+        yTop -= (yTop-rect.height()*0.5)*capDeformationFactor;
         float yBottom = rect.height() -radius * cos( bottomAngle );
+        yBottom -= (yBottom-rect.height()*0.5)*capDeformationFactor;
         for( int j=0; j<36; j++ )
             {
             float x = radius * sin( topAngle ) * sin( (90.0+j*10.0)*M_PI/180.0 );
diff --git a/effects/sphere.h b/effects/sphere.h
index d92cc8612c..a29b540adf 100644
--- a/effects/sphere.h
+++ b/effects/sphere.h
@@ -45,6 +45,7 @@ class SphereEffect
         bool mInited;
         bool mValid;
         GLShader* mShader;
+        float capDeformationFactor;
     };
 
 } // namespace