--- a/layout/svg/base/src/nsSVGSwitchFrame.cpp
+++ b/layout/svg/base/src/nsSVGSwitchFrame.cpp
@@ -162,17 +162,24 @@ nsSVGSwitchFrame::GetCoveredRegion()
   return rect;
 }
 
 NS_IMETHODIMP
 nsSVGSwitchFrame::UpdateCoveredRegion()
 {
   static_cast<nsSVGSwitchElement*>(mContent)->UpdateActiveChild();
 
-  return nsSVGSwitchFrameBase::UpdateCoveredRegion();
+  nsIFrame *kid = GetActiveChildFrame();
+  if (kid) {
+    nsISVGChildFrame* child = do_QueryFrame(kid);
+    if (child) {
+      child->UpdateCoveredRegion();
+    }
+  }
+  return NS_OK;
 }
 
 NS_IMETHODIMP
 nsSVGSwitchFrame::InitialUpdate()
 {
   nsSVGUtils::UpdateGraphic(this);
 
   return nsSVGSwitchFrameBase::InitialUpdate();