diff --git a/src/courseware/course/sidebar/common/SidebarBase.jsx b/src/courseware/course/sidebar/common/SidebarBase.jsx
index 05aa4969..50d8ada9 100644
--- a/src/courseware/course/sidebar/common/SidebarBase.jsx
+++ b/src/courseware/course/sidebar/common/SidebarBase.jsx
@@ -37,6 +37,7 @@ function SidebarBase({
     <section
       className={classNames('ml-0 ml-lg-4 border border-light-400 rounded-sm h-auto align-top', {
         'bg-white m-0 border-0 fixed-top vh-100 rounded-0': shouldDisplayFullScreen,
+        'min-vh-100': !shouldDisplayFullScreen,
       }, className)}
       style={{ width: shouldDisplayFullScreen ? '100%' : width }}
       aria-label={ariaLabel}