diff --git a/example/qml/window/MainWindow.qml b/example/qml/window/MainWindow.qml
index d6dc7dd..a0db491 100644
--- a/example/qml/window/MainWindow.qml
+++ b/example/qml/window/MainWindow.qml
@@ -98,7 +98,7 @@ CustomWindow {
         z:999
         items: ItemsOriginal
         footerItems:ItemsFooter
-        topPadding:Qt.platform.os === FluTools.isMacos() ? 20 : 5
+        topPadding:FluTools.isMacos() ? 20 : 5
         displayMode:MainEvent.displayMode
         logo: "qrc:/example/res/image/favicon.ico"
         title:"FluentUI"