--- a/layout/base/FrameLayerBuilder.cpp
+++ b/layout/base/FrameLayerBuilder.cpp
@@ -4047,17 +4047,18 @@ ContainerState::ProcessDisplayItems(nsDi
         }
         newLayerEntry->mOpaqueRegion = ComputeOpaqueRect(item,
           animatedGeometryRoot, layerClip, aList,
           &newLayerEntry->mHideAllLayersBelow,
           &newLayerEntry->mOpaqueForAnimatedGeometryRootParent);
       } else {
         bool useChildrenVisible =
           itemType == nsDisplayItem::TYPE_TRANSFORM &&
-          item->Frame()->IsPreserve3DLeaf();
+          (item->Frame()->IsPreserve3DLeaf() ||
+           item->Frame()->HasPerspective());
         const nsIntRegion &visible = useChildrenVisible ?
           item->GetVisibleRectForChildren().ToOutsidePixels(mAppUnitsPerDevPixel):
           itemVisibleRect;
 
         SetOuterVisibleRegionForLayer(ownLayer, visible,
             layerContentsVisibleRect.width >= 0 ? &layerContentsVisibleRect : nullptr,
             useChildrenVisible);
       }