diff --git a/public/app/plugins/panel/barchart/BarChartPanel.tsx b/public/app/plugins/panel/barchart/BarChartPanel.tsx
index 13555415e9d..4088029f4f4 100644
--- a/public/app/plugins/panel/barchart/BarChartPanel.tsx
+++ b/public/app/plugins/panel/barchart/BarChartPanel.tsx
@@ -92,7 +92,7 @@ export const BarChartPanel = (props: PanelProps<Options>) => {
 
   const xGroupsCount = vizSeries[0]?.length ?? 0;
   const seriesCount = vizSeries[0]?.fields.length ?? 0;
-  const totalSeries = info.series[0].fields.length - 1;
+  const totalSeries = Math.max(0, (info.series[0]?.fields.length ?? 0) - 1);
 
   let { builder, prepData } = useMemo(
     () => {