diff --git a/app/assets/javascripts/discourse/lib/utilities.js b/app/assets/javascripts/discourse/lib/utilities.js
index 70256c67f92..d5d58f7e62e 100644
--- a/app/assets/javascripts/discourse/lib/utilities.js
+++ b/app/assets/javascripts/discourse/lib/utilities.js
@@ -314,7 +314,7 @@ Discourse.Utilities = {
     @returns {Promise} a promise that will eventually be the cropped avatar.
   **/
   cropAvatar: function(url) {
-    const extension = /\.(\w{2,})$/.exec(url)[1];
+    var extension = /\.(\w{2,})$/.exec(url)[1];
     if (Discourse.SiteSettings.allow_animated_avatars && extension === "gif") {
       // can't crop animated gifs... let the browser stretch the gif
       return Ember.RSVP.resolve(url);
diff --git a/plugins/poll/assets/javascripts/poll_dialect.js b/plugins/poll/assets/javascripts/poll_dialect.js
index 87df9056180..405b8ee85fe 100644
--- a/plugins/poll/assets/javascripts/poll_dialect.js
+++ b/plugins/poll/assets/javascripts/poll_dialect.js
@@ -2,12 +2,12 @@
 
 (function() {
 
-  const DATA_PREFIX = "data-poll-";
-  const DEFAULT_POLL_NAME = "poll";
+  var DATA_PREFIX = "data-poll-";
+  var DEFAULT_POLL_NAME = "poll";
 
-  const WHITELISTED_ATTRIBUTES = ["type", "name", "min", "max", "step", "order", "status"];
+  var WHITELISTED_ATTRIBUTES = ["type", "name", "min", "max", "step", "order", "status"];
 
-  const ATTRIBUTES_REGEX = new RegExp("(" + WHITELISTED_ATTRIBUTES.join("|") + ")=['\"]?[^\\s\\]]+['\"]?", "g");
+  var ATTRIBUTES_REGEX = new RegExp("(" + WHITELISTED_ATTRIBUTES.join("|") + ")=['\"]?[^\\s\\]]+['\"]?", "g");
 
   Discourse.Dialect.replaceBlock({
     start: /\[poll((?:\s+\w+=[^\s\]]+)*)\]([\s\S]*)/igm,