diff --git a/layout/base/nsPresShell.cpp b/layout/base/nsPresShell.cpp
index 3a644ddce2..225dac8fc3 100644
--- a/layout/base/nsPresShell.cpp
+++ b/layout/base/nsPresShell.cpp
@@ -5286,7 +5286,7 @@ PresShell::PaintRangePaintInfo(nsTArray<nsAutoPtr<RangePaintInfo> >* aItems,
     gfxPoint rootOffset =
       nsLayoutUtils::PointToGfxPoint(rangeInfo->mRootOffset,
                                      pc->AppUnitsPerDevPixel());
-    ctx->SetMatrix(initialTM.Translate(rootOffset));
+    ctx->SetMatrix(gfxMatrix(initialTM).Translate(rootOffset));
     aArea.MoveBy(-rangeInfo->mRootOffset.x, -rangeInfo->mRootOffset.y);
     nsRegion visible(aArea);
     nsRefPtr<LayerManager> layerManager =