diff --git a/effects/taskbarthumbnail/taskbarthumbnail.cpp b/effects/taskbarthumbnail/taskbarthumbnail.cpp
index 1b0a5ae3e4..4f1572f91a 100644
--- a/effects/taskbarthumbnail/taskbarthumbnail.cpp
+++ b/effects/taskbarthumbnail/taskbarthumbnail.cpp
@@ -53,9 +53,9 @@ TaskbarThumbnailEffect::~TaskbarThumbnailEffect()
 
 void TaskbarThumbnailEffect::prePaintScreen( ScreenPrePaintData& data, int time )
     {
-//    if( thumbnails.count() > 0 )
-//        // TODO this should not be needed (it causes whole screen repaint)
-//        data.mask |= PAINT_SCREEN_WITH_TRANSFORMED_WINDOWS;
+    if (thumbnails.count() > 0) {
+       data.mask |= PAINT_SCREEN_WITH_TRANSFORMED_WINDOWS_WITHOUT_FULL_REPAINTS;
+    }
     effects->prePaintScreen(data, time);
     }