diff --git a/src/components/views/right_panel/PinnedMessagesCard.tsx b/src/components/views/right_panel/PinnedMessagesCard.tsx
index 3a4dc9cc92..a72731522f 100644
--- a/src/components/views/right_panel/PinnedMessagesCard.tsx
+++ b/src/components/views/right_panel/PinnedMessagesCard.tsx
@@ -160,6 +160,7 @@ const PinnedMessagesCard = ({ room, onClose }: IProps) => {
     } else {
         content = <div className="mx_PinnedMessagesCard_empty">
             <div>
+                { /* XXX: We reuse the classes for simplicity, but deliberately not the components for non-interactivity. */ }
                 <div className="mx_PinnedMessagesCard_MessageActionBar">
                     <div className="mx_MessageActionBar_maskButton mx_MessageActionBar_reactButton" />
                     <div className="mx_MessageActionBar_maskButton mx_MessageActionBar_replyButton" />