diff --git a/client/sidebar/RoomList.js b/client/sidebar/RoomList.js
index d8767cc79e3f0..927fb6d14fda1 100644
--- a/client/sidebar/RoomList.js
+++ b/client/sidebar/RoomList.js
@@ -83,7 +83,7 @@ export const Row = React.memo(({ data, index, style }) => {
 
 export const normalizeSidebarMessage = ({ ...message }) => {
 	if (message.msg) {
-		return filterMarkdown(message.msg);
+		return s.escapeHTML(filterMarkdown(message.msg));
 	}
 
 	if (message.attachments) {