diff --git a/src/browser/domUtility.js b/src/browser/domUtility.js
index 7c1bef8c..b231a17c 100644
--- a/src/browser/domUtility.js
+++ b/src/browser/domUtility.js
@@ -34,7 +34,7 @@ function treeToArray(elem) {
   var nextDescription;
   for (var height = 0; elem && height < MAX_HEIGHT; height++) {
     nextDescription = describeElement(elem);
-    if (nextDescription.tagName === 'html') {
+    if (!nextDescription || nextDescription.tagName === 'html') {
       break;
     }
     out.unshift(nextDescription);
diff --git a/test/browser.domUtility.test.js b/test/browser.domUtility.test.js
index d7154578..956673f9 100644
--- a/test/browser.domUtility.test.js
+++ b/test/browser.domUtility.test.js
@@ -109,6 +109,11 @@ describe('treeToArray', function () {
     var arr = d.treeToArray(e1);
     expect(arr.length).to.eql(5);
   });
+  it('should handle elements without tag names', function () {
+    var e1 = genElement(null);
+    var arr = d.treeToArray(e1);
+    expect(arr).to.eql([]);
+  });
   it('should put the innermost element last', function () {
     var e1 = genElement('div', 'id1');
     var e2 = genElement('div', 'id2', 'a b');