diff --git a/iron-flex-layout.html b/iron-flex-layout.html
index c7dd96a..99bc553 100644
--- a/iron-flex-layout.html
+++ b/iron-flex-layout.html
@@ -64,11 +64,9 @@
   // removing would be a breaking change, but new projects
   // should never rely on this.
   (function() {
-    if (Polymer.Settings && !Polymer.Settings.useNativeShadow) {
-      var style = document.createElement('style');
-      style.textContent = '[hidden] { display: none !important; }';
-      document.head.appendChild(style);
-    }
+    var style = document.createElement('style');
+    style.textContent = '[hidden] { display: none !important; }';
+    document.head.appendChild(style);
   })();
 </script>
 <custom-style>