diff --git a/lib/cartodb/controllers/named_maps.js b/lib/cartodb/controllers/named_maps.js
index 4fe1a1c3..93566cc9 100644
--- a/lib/cartodb/controllers/named_maps.js
+++ b/lib/cartodb/controllers/named_maps.js
@@ -89,7 +89,7 @@ NamedMapsController.prototype.register = function(app) {
     );
 };
 
-NamedMapsController.prototype.getNamedMapProvider = function ({ label, forcedFormat }) {
+NamedMapsController.prototype.getNamedMapProvider = function ({ label, forcedFormat = null }) {
     return function getNamedMapProviderMiddleware (req, res, next) {
         const { user } = res.locals;
         const { config, auth_token } = req.query;