diff --git a/interfaces/kits/napi/window_runtime/window_napi/js_window_utils.cpp b/interfaces/kits/napi/window_runtime/window_napi/js_window_utils.cpp
index a04d8792..d51a2459 100644
--- a/interfaces/kits/napi/window_runtime/window_napi/js_window_utils.cpp
+++ b/interfaces/kits/napi/window_runtime/window_napi/js_window_utils.cpp
@@ -236,6 +236,7 @@ NativeValue* CreateJsWindowPropertiesObject(NativeEngine& engine, sptr<Window>&
     object->SetProperty("brightness", CreateJsValue(engine, window->GetBrightness()));
     object->SetProperty("isTransparent", CreateJsValue(engine, window->IsTransparent()));
     object->SetProperty("isRoundCorner", CreateJsValue(engine, false)); // empty method
+    object->SetProperty("dimBehindValue", CreateJsValue(engine, 0));
     return objValue;
 }
 static std::string GetHexColor(uint32_t color)