diff --git a/lib/cartodb/controllers/named_maps.js b/lib/cartodb/controllers/named_maps.js
index 5744633a..92ba4ea6 100644
--- a/lib/cartodb/controllers/named_maps.js
+++ b/lib/cartodb/controllers/named_maps.js
@@ -85,6 +85,12 @@ NamedMapsController.prototype.getNamedMapProvider = function (label) {
         const { user } = res.locals;
         const { config, auth_token } = req.query;
         const { template_id } = req.params;
+
+        // We force always the tile to be generated using PNG because
+        // is the only format we support by now
+        res.locals.format = 'png';
+        res.locals.layer = res.locals.layer || 'all';
+
         const params = getRequestParams(res.locals);
 
         this.namedMapProviderCache.get(user, template_id, config, auth_token, params, (err, namedMapProvider) => {
@@ -311,10 +317,6 @@ NamedMapsController.prototype.getImage = function (label) {
         height = +height;
 
         const format = req.params.format === 'jpg' ? 'jpeg' : 'png';
-        // We force always the tile to be generated using PNG because
-        // is the only format we support by now
-        res.locals.format = 'png';
-        res.locals.layer = res.locals.layer || 'all';
 
         if (zoom !== undefined && center) {
             return this.previewBackend.getImage(namedMapProvider, format, width, height, zoom, center,