diff --git a/app/assets/javascripts/discourse/lib/markdown.js b/app/assets/javascripts/discourse/lib/markdown.js
index b9861f78147..6d5e2baac14 100644
--- a/app/assets/javascripts/discourse/lib/markdown.js
+++ b/app/assets/javascripts/discourse/lib/markdown.js
@@ -205,7 +205,7 @@ Discourse.Markdown = {
       // Add anything whitelisted to the list of elements if it's not in there
       // already.
       var elements = window.html4.ELEMENTS;
-      Ember.keys(_validTags).forEach(function(t) {
+      Object.keys(_validTags).forEach(function(t) {
         if (!elements[t]) {
           elements[t] = 0;
         }