diff --git a/lib/utils/boot.js b/lib/utils/boot.js
index 5fc25b58a6..4b8c6cdc87 100644
--- a/lib/utils/boot.js
+++ b/lib/utils/boot.js
@@ -13,9 +13,9 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
  * When using Closure Compiler, JSCompiler_renameProperty(property, object) is replaced by the munged name for object[property]
  * We cannot alias this function, so we have to use a small shim that has the same behavior when not compiling.
  *
- * @param {string} prop
- * @param {?Object} obj
- * @return {string}
+ * @param {string} prop Property name
+ * @param {?Object} obj Reference object
+ * @return {string} Dereferenced value
  */
 window.JSCompiler_renameProperty = function(prop, obj) {
   return prop;