diff --git a/src/course-home/outline-tab/LmsHtmlFragment.jsx b/src/course-home/outline-tab/LmsHtmlFragment.jsx
index 778e7d79d8..bde2ca9389 100644
--- a/src/course-home/outline-tab/LmsHtmlFragment.jsx
+++ b/src/course-home/outline-tab/LmsHtmlFragment.jsx
@@ -53,6 +53,7 @@ const LmsHtmlFragment = ({
       scrolling="no"
       srcDoc={wholePage}
       title={title}
+      tabIndex={-1}
       {...rest}
     />
   );