diff --git a/src/standard/x-styling.html b/src/standard/x-styling.html
index 891dfe2504..23150ed4f8 100644
--- a/src/standard/x-styling.html
+++ b/src/standard/x-styling.html
@@ -18,7 +18,6 @@
     var serializeValueToAttribute = Polymer.Base.serializeValueToAttribute;
 
     var propertyUtils = Polymer.StyleProperties;
-    var styleUtil = Polymer.StyleUtil;
     var styleTransformer = Polymer.StyleTransformer;
     var styleDefaults = Polymer.StyleDefaults;