diff --git a/lib/cartodb/api/map/clustered-features-layergroup-controller.js b/lib/cartodb/api/map/clustered-features-layergroup-controller.js
index 9779a09a..48e56b32 100644
--- a/lib/cartodb/api/map/clustered-features-layergroup-controller.js
+++ b/lib/cartodb/api/map/clustered-features-layergroup-controller.js
@@ -85,7 +85,8 @@ function getClusteredFeatures (clusterBackend) {
             }
 
             res.statusCode = 200;
-            res.body = features;
+            const { rows, fields } = features;
+            res.body = { rows, fields };
 
             next();
         });