diff --git a/lib/cartodb/models/aggregation/aggregation-query.js b/lib/cartodb/models/aggregation/aggregation-query.js
index 2a09efde..d50bb458 100644
--- a/lib/cartodb/models/aggregation/aggregation-query.js
+++ b/lib/cartodb/models/aggregation/aggregation-query.js
@@ -211,6 +211,7 @@ const aggregationQueryTemplates = {
             GROUP BY _cdb_gx, _cdb_gy ${dimensionNames(ctx)}
         )
         SELECT
+            row_number() over() AS cartodb_id,
             ST_SetSRID(ST_MakePoint((_cdb_gx+0.5)*res, (_cdb_gy+0.5)*res), 3857) AS the_geom_webmercator
             ${dimensionNames(ctx)}
             ${aggregateColumnNames(ctx)}