diff --git a/api/@ohos.application.formBindingData.d.ts b/api/@ohos.application.formBindingData.d.ts
index 04208c834257c68920f3418d1cc45438ee4612bf..1b9ee8f39e972cabee51ab8351f5f80ac990fe17 100644
--- a/api/@ohos.application.formBindingData.d.ts
+++ b/api/@ohos.application.formBindingData.d.ts
@@ -31,7 +31,7 @@ declare namespace formBindingData {
      * @param obj Indicates the FormBindingData instance data.
      * @return Returns the {@link FormBindingData} instance.
      */
-    function createFormBindingData(obj: Object | string): FormBindingData;
+    function createFormBindingData(obj?: Object | string): FormBindingData;
 
     interface FormBindingData {
         data: Object