diff --git a/app/assets/javascripts/deprecated.js b/app/assets/javascripts/deprecated.js
index 5f8a06d597c..ee6592848ae 100644
--- a/app/assets/javascripts/deprecated.js
+++ b/app/assets/javascripts/deprecated.js
@@ -2,7 +2,7 @@
   var Discourse = require('discourse').default;
 
   function deprecate(module, methods) {
-    const result = {};
+    var result = {};
 
     methods.forEach(function(m) {
       result[m] = function() {