diff --git a/lib/cartodb/models/mapconfig_overviews_adapter.js b/lib/cartodb/models/mapconfig_overviews_adapter.js
index 72a29485..df81dfee 100644
--- a/lib/cartodb/models/mapconfig_overviews_adapter.js
+++ b/lib/cartodb/models/mapconfig_overviews_adapter.js
@@ -10,8 +10,8 @@ module.exports = MapConfigOverviewsAdapter;
 MapConfigOverviewsAdapter.prototype.getLayers = function(username, layers, callback) {
   var self = this;
 
-  if (!layers) {
-      return callback(null);
+  if (!layers || layers.length === 0) {
+      return callback(null, layers);
   }
 
   var augmentLayersQueue = queue(layers.length);
@@ -39,7 +39,7 @@ MapConfigOverviewsAdapter.prototype.getLayers = function(username, layers, callb
     }
 
     if (!layers || layers.length === 0) {
-        return callback(new Error('Missing layers array from layergroup config'));
+        return callback(new Error('XX Missing layers array from layergroup config'));
     }
 
     return callback(null, layers);