diff --git a/src/standard/utils.html b/src/standard/utils.html
index 5356c54722..84528710d2 100644
--- a/src/standard/utils.html
+++ b/src/standard/utils.html
@@ -402,7 +402,7 @@
      * Checks whether an element is in this element's light DOM tree.
      *
      * @method isLightDescendant
-     * @param {Node} node The element to be checked.
+     * @param {?Node} node The element to be checked.
      * @return {Boolean} true if node is in this element's light DOM tree.
      */
     isLightDescendant: function(node) {