diff --git a/lib/cartodb/models/mapconfig/adapter/aggregation-mapconfig-adapter.js b/lib/cartodb/models/mapconfig/adapter/aggregation-mapconfig-adapter.js
index aafbc367..27f4b613 100644
--- a/lib/cartodb/models/mapconfig/adapter/aggregation-mapconfig-adapter.js
+++ b/lib/cartodb/models/mapconfig/adapter/aggregation-mapconfig-adapter.js
@@ -213,12 +213,6 @@ module.exports = class AggregationMapConfigAdapter {
             typeof aggregation !== 'boolean' &&
             typeof aggregation.columns === 'object';
 
-        let aggregationColumns = [];
-
-        if (hasAggregationColumns) {
-            aggregationColumns = Object.keys(aggregation.columns);
-        }
-
-        return aggregationColumns;
+        return hasAggregationColumns ? Object.keys(aggregation.columns) : [];
     }
 };