diff --git a/src/js/udom.js b/src/js/udom.js
index 0f4420e28..ea6757f9a 100644
--- a/src/js/udom.js
+++ b/src/js/udom.js
@@ -173,7 +173,7 @@ var doesMatchSelector = function(node, selector) {
 /******************************************************************************/
 
 DOMList.prototype.nodeAt = function(i) {
-    return this.nodes[i];
+    return this.nodes[i] || null;
 };
 
 DOMList.prototype.at = function(i) {