diff --git a/lib/cartodb/backends/user-limits.js b/lib/cartodb/backends/user-limits.js
index f306cadf..87587f37 100644
--- a/lib/cartodb/backends/user-limits.js
+++ b/lib/cartodb/backends/user-limits.js
@@ -39,14 +39,12 @@ UserLimitsBackend.prototype.getRenderLimits = function (username, apiKey, callba
 };
 
 UserLimitsBackend.prototype.getTimeoutRenderLimit = function (username, apiKey, callback) {
-    var self = this;
-
-    isAuthorized(self.metadataBackend, username, apiKey, (err, authorized) => {
+    isAuthorized(this.metadataBackend, username, apiKey, (err, authorized) => {
         if (err) {
             return callback(err);
         }
 
-        self.metadataBackend.getUserTimeoutRenderLimits(username, function (err, timeoutRenderLimit) {
+        this.metadataBackend.getUserTimeoutRenderLimits(username, (err, timeoutRenderLimit) => {
             if (err) {
                 return callback(err);
             }