diff --git a/src/packages/core/src/datalist/types.ts b/src/packages/core/src/datalist/types.ts
index 8f921e55..d95f0a7c 100644
--- a/src/packages/core/src/datalist/types.ts
+++ b/src/packages/core/src/datalist/types.ts
@@ -34,5 +34,5 @@ export interface DataListProps extends CommonAttributes {
    * Title width in pixels.
    * @default 172
    */
-  titleWidth: number;
+  titleWidth?: number;
 }