diff --git a/lib/cartodb/models/dataview/histograms/date-histogram.js b/lib/cartodb/models/dataview/histograms/date-histogram.js
index a14e90e9..6695877a 100644
--- a/lib/cartodb/models/dataview/histograms/date-histogram.js
+++ b/lib/cartodb/models/dataview/histograms/date-histogram.js
@@ -187,7 +187,7 @@ module.exports = class DateHistogram extends BaseHistogram {
     }
 
     _buildQuery (psql, override, callback) {
-        if (!DATE_AGGREGATIONS.hasOwnProperty(this._getAggregation(override))) {
+        if (!this.isValidAggregation(override)) {
             return callback(new Error('Invalid aggregation value. Valid ones: ' +
                 Object.keys(DATE_AGGREGATIONS).join(', ')
             ));
@@ -221,6 +221,10 @@ module.exports = class DateHistogram extends BaseHistogram {
         return callback(null, histogramSql);
     }
 
+    _isValidAggregation (override) {
+        return DATE_AGGREGATIONS.hasOwnProperty(this._getAggregation(override));
+    }
+
     _getAutomaticAggregation (psql, callback) {
         const dateIntervalQuery = dateIntervalQueryTpl({
             query: this.query,