diff --git a/effects/slidingpopups/slidingpopups.cpp b/effects/slidingpopups/slidingpopups.cpp
index d201ac2b33..34bdac4049 100644
--- a/effects/slidingpopups/slidingpopups.cpp
+++ b/effects/slidingpopups/slidingpopups.cpp
@@ -122,25 +122,28 @@ void SlidingPopupsEffect::paintWindow(EffectWindow* w, int mask, QRegion region,
                 progress = 1.0;
         }
         const int start = mWindowsData[ w ].start;
+        QRect r;
 
         switch(mWindowsData[ w ].from) {
         case West:
             data.xTranslate += (start - w->width()) * progress;
-            clippedRegion = clippedRegion.subtracted(QRegion(start - w->width(), w->y(), w->width(), w->height()));
+            r = QRect(start - w->width(), w->y(), w->width(), w->height());
             break;
         case North:
             data.yTranslate += (start - w->height()) * progress;
-            clippedRegion = clippedRegion.subtracted(QRegion(w->x(), start - w->height(), w->width(), w->height()));
+            r = QRect(w->x(), start - w->height(), w->width(), w->height());
             break;
         case East:
             data.xTranslate += (start - w->x()) * progress;
-            clippedRegion = clippedRegion.subtracted(QRegion(w->x() + w->width(), w->y(), w->width(), w->height()));
+            r = QRect(w->x() + w->width(), w->y(), w->width(), w->height());
             break;
         case South:
         default:
             data.yTranslate += (start - w->y()) * progress;
-            clippedRegion = clippedRegion.subtracted(QRegion(w->x(), start, w->width(), w->height()));
+            r = QRect(w->x(), start, w->width(), w->height());
         }
+        clippedRegion = clippedRegion.subtracted(r);
+        effects->addRepaint(r);
     }
 
     effects->paintWindow(w, mask, clippedRegion, data);