diff --git a/effects/desktopgrid/desktopgrid.cpp b/effects/desktopgrid/desktopgrid.cpp
--- a/effects/desktopgrid/desktopgrid.cpp
+++ b/effects/desktopgrid/desktopgrid.cpp
@@ -202,7 +202,7 @@
         // the moving window has to be painted on top of all desktops
         QPoint diff = cursorPos() - m_windowMoveStartPoint;
         QRect geo = m_windowMoveGeometry.translated(diff);
-        WindowPaintData d(windowMove);
+        WindowPaintData d(windowMove, data.projectionMatrix());
         d *= QVector2D((qreal)geo.width() / (qreal)windowMove->width(), (qreal)geo.height() / (qreal)windowMove->height());
         d += QPoint(geo.left() - windowMove->x(), geo.top() - windowMove->y());
         effects->drawWindow(windowMove, PAINT_WINDOW_TRANSFORMED | PAINT_WINDOW_LANCZOS, infiniteRegion(), d);