diff --git a/lib/cartodb/controllers/named_maps.js b/lib/cartodb/controllers/named_maps.js
index 912020f7..40faf214 100644
--- a/lib/cartodb/controllers/named_maps.js
+++ b/lib/cartodb/controllers/named_maps.js
@@ -176,8 +176,7 @@ function getTemplate ({ label }) {
 
 function prepareLayerFilterFromPreviewLayers ({ namedMapProviderCache, label }) {
     return function prepareLayerFilterFromPreviewLayersMiddleware (req, res, next) {
-        const { user, template } = res.locals;
-        const { template_id } = req.params;
+        const { template } = res.locals;
         const { config, auth_token } = req.query;
 
         if (!template || !template.view || !template.view.preview_layers) {
@@ -197,7 +196,15 @@ function prepareLayerFilterFromPreviewLayers ({ namedMapProviderCache, label })
             return next();
         }
 
-        const params = getRequestParams(res.locals);
+        const { user, token, cache_buster, api_key } = res.locals;
+        const { dbuser, dbname, dbpassword, dbhost, dbport } = res.locals;
+        const { template_id, format } = req.params;
+
+        const params = {
+            user, token, cache_buster, api_key,
+            dbuser, dbname, dbpassword, dbhost, dbport,
+            template_id, format
+        };
 
         // overwrites 'all' default filter
         params.layer = layerVisibilityFilter.join(',');