diff --git a/lib/cartodb/models/aggregation/aggregation-mapconfig.js b/lib/cartodb/models/aggregation/aggregation-mapconfig.js
index 9306518c..d3666897 100644
--- a/lib/cartodb/models/aggregation/aggregation-mapconfig.js
+++ b/lib/cartodb/models/aggregation/aggregation-mapconfig.js
@@ -173,16 +173,12 @@ module.exports = class AggregationMapConfig extends MapConfig {
 
         let aggregatedColumns = [];
         if (columns) {
-            aggregatedColumns = Object.keys(columns)
-                .map(key => columns[key].aggregated_column)
-                .filter(aggregatedColumn => typeof aggregatedColumn === 'string');
+            aggregatedColumns = Object.keys(columns);
         }
 
         let dimensionsColumns = [];
         if (dimensions) {
-            dimensionsColumns = Object.keys(dimensions)
-                .map(key => dimensions[key])
-                .filter(dimension => typeof dimension === 'string');
+            dimensionsColumns = Object.keys(dimensions);
         }
 
         return removeDuplicates(aggregatedColumns.concat(dimensionsColumns));