diff --git a/src/widget/widgets/value.js b/src/widget/widgets/value.js
index 029192b..e83c06f 100644
--- a/src/widget/widgets/value.js
+++ b/src/widget/widgets/value.js
@@ -77,7 +77,7 @@ class WidgetValue extends Component {
return (
{this.props.widget.name}
- {Number.isNaN(value_to_render) ? NaN : format('.3f')(value_to_render)}
+ {Number.isNaN(value_to_render) ? String(NaN) : format('.3f')(value_to_render)}
{this.props.widget.customProperties.showUnit &&
[{this.state.unit}]
}