diff --git a/packages/rrweb-player/typings/index.d.ts b/packages/rrweb-player/typings/index.d.ts
index 082c3eaf69..ca99b3014b 100755
--- a/packages/rrweb-player/typings/index.d.ts
+++ b/packages/rrweb-player/typings/index.d.ts
@@ -13,7 +13,8 @@ export type RRwebPlayerOptions = {
      */
     events: eventWithTime[];
     /**
-     * The class names to apply to the player
+     * The classname which apply to the player
+     * @defaultValue `''`
      */
     playerClassName?: string;
     /**