diff --git a/src/pages/Telemetry/TelemetryView/cursorRender.jsx b/src/pages/Telemetry/TelemetryView/cursorRender.jsx
index d788a02..7f7245b 100644
--- a/src/pages/Telemetry/TelemetryView/cursorRender.jsx
+++ b/src/pages/Telemetry/TelemetryView/cursorRender.jsx
@@ -14,7 +14,7 @@ export const cursorRender = (group, data) => {
     if (group.charts.length <= 0) return <></>
     const firstChart = group.charts[0]
     const y = firstChart.y(d)
-    const yValue = firstChart.yAxis.format?.(y) ?? defaultValueRender(y, chart.yAxis.unit)
+    const yValue = firstChart.yAxis.format?.(y) ?? defaultValueRender(y, firstChart.yAxis.unit)
     const xFormat = (chart) => {
         const v = chart.x(d)
         return chart.xAxis.format?.(v) ?? defaultValueRender(v, chart.xAxis.unit)