diff --git a/src/component/dataZoom/SliderZoomModel.ts b/src/component/dataZoom/SliderZoomModel.ts
index 75c9d51ea6..19f6fefa42 100644
--- a/src/component/dataZoom/SliderZoomModel.ts
+++ b/src/component/dataZoom/SliderZoomModel.ts
@@ -124,7 +124,7 @@ export interface SliderDataZoomOption extends DataZoomOption, BoxLayoutOptionMix
     brushStyle?: ItemStyleOption
 
     emphasis?: {
-        handleLabel: SliderHandleLabelOption
+        handleLabel?: SliderHandleLabelOption
         handleStyle?: ItemStyleOption
         moveHandleStyle?: ItemStyleOption
     },