diff --git a/src/courseware/course/sidebar/sidebars/discussions/Discussions.scss b/src/courseware/course/sidebar/sidebars/discussions/Discussions.scss
new file mode 100644
index 0000000000..fe94248b26
--- /dev/null
+++ b/src/courseware/course/sidebar/sidebars/discussions/Discussions.scss
@@ -0,0 +1,5 @@
+.discussions-sidebar-frame {
+    @media (max-width: -1 + map-get($grid-breakpoints, "xl")) {
+        max-height: calc(100vh - 65px);
+    }
+}
diff --git a/src/courseware/course/sidebar/sidebars/discussions/DiscussionsSidebar.jsx b/src/courseware/course/sidebar/sidebars/discussions/DiscussionsSidebar.jsx
index 13bb38e719..5cc3637dc3 100644
--- a/src/courseware/course/sidebar/sidebars/discussions/DiscussionsSidebar.jsx
+++ b/src/courseware/course/sidebar/sidebars/discussions/DiscussionsSidebar.jsx
@@ -38,7 +38,7 @@ const DiscussionsSidebar = ({ intl }) => {
     >
       <iframe
         src={`${discussionsUrl}?inContextSidebar`}
-        className="d-flex sticky-top vh-100 w-100 border-0"
+        className="d-flex sticky-top vh-100 w-100 border-0 discussions-sidebar-frame"
         title={intl.formatMessage(messages.discussionsTitle)}
         allow="clipboard-write"
         loading="lazy"
diff --git a/src/index.scss b/src/index.scss
index 6a72b32f97..d844d11ba4 100755
--- a/src/index.scss
+++ b/src/index.scss
@@ -432,6 +432,7 @@
 
 // Import component-specific sass files
 @import "courseware/course/celebration/CelebrationModal.scss";
+@import "courseware/course/sidebar/sidebars/discussions/Discussions.scss";
 @import "courseware/course/sidebar/sidebars/notifications/NotificationIcon.scss";
 @import "courseware/course/sequence/lock-paywall/LockPaywall.scss";
 @import "shared/streak-celebration/StreakCelebrationModal.scss";