--- a/servo/components/style/traversal.rs
+++ b/servo/components/style/traversal.rs
@@ -694,16 +694,22 @@ pub fn recalc_style_at<E, D>(traversal: 
         // data in the subtree, notify the caller to early-return.
         if data.styles().is_display_none() {
             debug!("{:?} style is display:none - clearing data from descendants.",
                    element);
             clear_descendant_data(element, &|e| unsafe { D::clear_element_data(&e) });
         }
     }
 
+    // We must always cascade native anonymous subtrees, since they inherit styles
+    // from their first non-NAC ancestor.
+    if element.is_native_anonymous() {
+        cascade_hint |= RECASCADE_SELF;
+    }
+
     // Now that matching and cascading is done, clear the bits corresponding to
     // those operations and compute the propagated restyle hint.
     let mut propagated_hint = match data.get_restyle_mut() {
         None => StoredRestyleHint::empty(),
         Some(r) => {
             debug_assert!(context.shared.traversal_flags.for_animation_only() ||
                           !r.hint.has_animation_hint(),
                           "animation restyle hint should be handled during \