diff --git a/lib/cartodb/models/dataview/histogram.js b/lib/cartodb/models/dataview/histogram.js
index 5a4f713b..dbe8f014 100644
--- a/lib/cartodb/models/dataview/histogram.js
+++ b/lib/cartodb/models/dataview/histogram.js
@@ -606,7 +606,7 @@ module.exports = class Histogram extends BaseWidget {
             binsStart = populateBinStart(override, firstRow);
 
             if (Number.isFinite(timestampStart)) {
-                aggregation = getAggregation(override, this.aggregation);
+                aggregation = this.getAggregation(override);
                 offset = getOffset(override, this.offset);
             }
 
@@ -650,6 +650,10 @@ module.exports = class Histogram extends BaseWidget {
             _query: this.query
         });
     }
+
+    getAggregation (override) {
+        return override && override.aggregation ? override.aggregation : this.aggregation;
+    }
 };
 
 var DATE_AGGREGATIONS = {
@@ -663,9 +667,6 @@ var DATE_AGGREGATIONS = {
     'year': true
 };
 
-function getAggregation(override, aggregation) {
-    return override && override.aggregation ? override.aggregation : aggregation;
-}
 
 function getOffset(override, offset) {
     if (override && override.offset) {