diff --git a/lib/cartodb/middleware/context/apikey-credentials.js b/lib/cartodb/middleware/context/apikey-credentials.js
index bde45da4..5302050e 100644
--- a/lib/cartodb/middleware/context/apikey-credentials.js
+++ b/lib/cartodb/middleware/context/apikey-credentials.js
@@ -1,10 +1,12 @@
 'use strict';
 
-module.exports = () => function apikeyTokenMiddleware(req, res, next) {
-    const apikeyCredentials = getApikeyCredentialsFromRequest(req);
-    res.locals.api_key = apikeyCredentials.token;
-    res.locals.apikeyUsername = apikeyCredentials.username;
-    return next();
+module.exports = function() {
+    return function apikeyTokenMiddleware(req, res, next) {
+        const apikeyCredentials = getApikeyCredentialsFromRequest(req);
+        res.locals.api_key = apikeyCredentials.token;
+        res.locals.apikeyUsername = apikeyCredentials.username;
+        return next();
+    };
 };
 
 //--------------------------------------------------------------------------------