diff --git a/components/layout_thread/dom_wrapper.rs b/components/layout_thread/dom_wrapper.rs
index 55bacd037cb..309ddaf7e93 100644
--- a/components/layout_thread/dom_wrapper.rs
+++ b/components/layout_thread/dom_wrapper.rs
@@ -397,6 +397,14 @@ impl<'le> TElement for ServoLayoutElement<'le> {
         unsafe { self.element.is_html_element() }
     }
 
+    fn is_mathml_element(&self) -> bool {
+        *self.element.namespace() == ns!(mathml)
+    }
+
+    fn is_svg_element(&self) -> bool {
+        *self.element.namespace() == ns!(svg)
+    }
+
     fn style_attribute(&self) -> Option<ArcBorrow<StyleLocked<PropertyDeclarationBlock>>> {
         unsafe {
             (*self.element.style_attribute()).as_ref().map(|x| x.borrow_arc())
diff --git a/components/style/style_adjuster.rs b/components/style/style_adjuster.rs
index d86639300e9..b7270976ead 100644
--- a/components/style/style_adjuster.rs
+++ b/components/style/style_adjuster.rs
@@ -5,7 +5,6 @@
 //! A struct to encapsulate all the style fixups and flags propagations
 //! a computed style needs in order for it to adhere to the CSS spec.
 
-use Atom;
 use app_units::Au;
 use dom::TElement;
 use properties::{self, CascadeFlags, ComputedValues, StyleBuilder};
@@ -52,6 +51,8 @@ fn is_effective_display_none_for_display_contents<E>(element: E) -> bool
 where
     E: TElement,
 {
+    use Atom;
+
     // FIXME(emilio): This should be an actual static.
     lazy_static! {
         static ref SPECIAL_HTML_ELEMENTS: [Atom; 16] = [