diff --git a/interfaces/kits/js/@ohos.net.webSocket.d.ts b/interfaces/kits/js/@ohos.net.webSocket.d.ts
index 26af71eb57657a60c29c10f49e7e4a6dff160ebc..892b4eaa555d85efa49e0cf9289da09f50f084c8 100644
--- a/interfaces/kits/js/@ohos.net.webSocket.d.ts
+++ b/interfaces/kits/js/@ohos.net.webSocket.d.ts
@@ -171,6 +171,14 @@ declare namespace webSocket {
      * @since 12
      */
     protocol?: string;
+
+    /**
+     * Self defined pingPongTime.
+     * @type {?number}
+     * @syscap SystemCapability.Communication.NetStack
+     * @since 12
+     */
+    pingPongTime?: number;
   }
 
   /**