diff --git a/addons/web/static/src/js/view_pivot.js b/addons/web/static/src/js/view_pivot.js
index 8dbfb3360e1..b9e3f07cb00 100644
--- a/addons/web/static/src/js/view_pivot.js
+++ b/addons/web/static/src/js/view_pivot.js
@@ -558,7 +558,7 @@ instance.web.PivotView = instance.web.View.extend({
             display_total = this.main_col.width > 1;
 
         var groupby_labels = _.map(this.main_col.groupbys, function (gb) {
-            return self.groupable_fields[gb.split(':')[0]].string;
+            return self.fields[gb.split(':')[0]].string;
         });
 
         for (i = 0; i < headers.length; i++) {