diff --git a/app/assets/javascripts/admin/addon/components/admin-report-stacked-chart.gjs b/app/assets/javascripts/admin/addon/components/admin-report-stacked-chart.gjs
index fd3af019a5b..8a7e2df0973 100644
--- a/app/assets/javascripts/admin/addon/components/admin-report-stacked-chart.gjs
+++ b/app/assets/javascripts/admin/addon/components/admin-report-stacked-chart.gjs
@@ -42,7 +42,8 @@ export default class AdminReportStackedChart extends Component {
             callbacks: {
               beforeFooter: (tooltipItem) => {
                 const total = tooltipItem.reduce(
-                  (sum, item) => sum + parseInt(item.parsed.y || 0, 10)
+                  (sum, item) => sum + parseInt(item.parsed.y || 0, 10),
+                  0
                 );
                 return `= ${total}`;
               },