diff --git a/frontend/src/components/markdown-viewer.js b/frontend/src/components/markdown-viewer.js
index b2341a8f87..a4aa67df5d 100644
--- a/frontend/src/components/markdown-viewer.js
+++ b/frontend/src/components/markdown-viewer.js
@@ -9,7 +9,7 @@ const viewerPropTypes = {
   lastModified: PropTypes.string,
   latestContributor: PropTypes.string,
   markdownContent: PropTypes.string,
-  onContentRendered: PropTypes.func,
+  onContentRendered: PropTypes.func.isRequired,
   activeTitleIndex: PropTypes.number
 };
 
diff --git a/frontend/src/pages/wiki/main-panel.js b/frontend/src/pages/wiki/main-panel.js
index f5ab4848e8..8c320382fb 100644
--- a/frontend/src/pages/wiki/main-panel.js
+++ b/frontend/src/pages/wiki/main-panel.js
@@ -46,6 +46,10 @@ class MainPanel extends Component {
     this.props.onMainNavBarClick(e.target.dataset.path);
   }
 
+  onContentRendered = (markdownViewer) => {
+    //
+  }
+
   render() {
 
     let filePathList = this.props.filePath.split('/');
@@ -107,6 +111,7 @@ class MainPanel extends Component {
                 lastModified = {this.props.lastModified}
                 onLinkClick={this.props.onLinkClick}
                 isFileLoading={this.props.isFileLoading}
+                onContentRendered={this.onContentRendered}
               />
             }
             { !this.props.isViewFileState &&