diff --git a/lib/cartodb/middleware/error-middleware.js b/lib/cartodb/middleware/error-middleware.js
index aac05eb4..ce44daa3 100644
--- a/lib/cartodb/middleware/error-middleware.js
+++ b/lib/cartodb/middleware/error-middleware.js
@@ -163,7 +163,7 @@ function errorMessageWithContext(err) {
 }
 
 function logErrors(errors, statusCode, res) {
-    const errorsCopy = errors.slice(0);
+    let errorsCopy = errors.slice(0);
     
     if(!errorsCopy || !errorsCopy.length) {
         return;
@@ -171,7 +171,7 @@ function logErrors(errors, statusCode, res) {
     
     const mainError = errorsCopy.shift();
 
-    const errorsLog = {
+    let errorsLog = {
         statusCode: statusCode || 200,
         message:    mainError.message,
         name:       mainError.name,