diff --git a/content/base/src/nsStyleLinkElement.cpp b/content/base/src/nsStyleLinkElement.cpp
index 4567571ea1a..a52b7b602cf 100644
--- a/content/base/src/nsStyleLinkElement.cpp
+++ b/content/base/src/nsStyleLinkElement.cpp
@@ -213,7 +213,8 @@ IsScopedStyleElement(nsIContent* aContent)
   // This is quicker than, say, QIing aContent to nsStyleLinkElement
   // and then calling its virtual GetStyleSheetInfo method to find out
   // if it is scoped.
-  return aContent->IsHTML(nsGkAtoms::style) &&
+  return (aContent->IsHTML(nsGkAtoms::style) ||
+          aContent->IsSVG(nsGkAtoms::style)) &&
          aContent->HasAttr(kNameSpaceID_None, nsGkAtoms::scoped);
 }