diff --git a/src/plugins/chart_expressions/expression_metric/public/components/metric_vis.tsx b/src/plugins/chart_expressions/expression_metric/public/components/metric_vis.tsx
index cb352fe883152..109079f43fb8f 100644
--- a/src/plugins/chart_expressions/expression_metric/public/components/metric_vis.tsx
+++ b/src/plugins/chart_expressions/expression_metric/public/components/metric_vis.tsx
@@ -184,7 +184,7 @@ export const MetricVis = ({
     const baseMetric: MetricWNumber = {
       value,
       valueFormatter: formatPrimaryMetric,
-      title,
+      title: String(title),
       subtitle,
       icon: config.metric?.icon ? getIcon(config.metric?.icon) : undefined,
       extra: (