diff --git a/public/react/src/modules/page/MainContent.js b/public/react/src/modules/page/MainContent.js
index b0f8c593..9f4b9fd4 100644
--- a/public/react/src/modules/page/MainContent.js
+++ b/public/react/src/modules/page/MainContent.js
@@ -17,7 +17,7 @@ import Button from 'material-ui/Button';
 import './tpiPage.css';
 import './tpiPageForMobile.css';
 const $ = window.$;
-const showIframeContent = window.location.search.indexOf('enc=1') != -1;
+const showIframeContent = window.location.search.indexOf('vnc=1') != -1;
 class MainContent extends Component {
 	componentDidMount() {
 		// ios下图标位置有问题