diff --git a/effects/slideback/slideback.cpp b/effects/slideback/slideback.cpp
index 97400bc62d..e7313c0cbf 100644
--- a/effects/slideback/slideback.cpp
+++ b/effects/slideback/slideback.cpp
@@ -295,7 +295,7 @@ void SlideBackEffect::slotTabBoxClosed()
 bool SlideBackEffect::isWindowUsable(EffectWindow* w)
 {
     return w && (w->isNormalWindow() || w->isDialog()) && !w->keepAbove() && !w->isDeleted() && !w->isMinimized()
-           && w->isCurrentTab();
+           && w->isCurrentTab() && w->isPaintingEnabled();
 }
 
 bool SlideBackEffect::intersects(EffectWindow* windowUnder, const QRect &windowOverGeometry)