diff --git a/src/platform/web/parsehtml.js b/src/platform/web/parsehtml.js
index 456559d9..8db9a92c 100644
--- a/src/platform/web/parsehtml.js
+++ b/src/platform/web/parsehtml.js
@@ -56,6 +56,7 @@ class HTMLParseResult {
 
 const sanitizeConfig = {
     ALLOWED_URI_REGEXP: /^(?:(?:(?:f|ht)tps?|mailto|tel|callto|cid|xmpp|xxx|mxc):|[^a-z]|[a-z+.-]+(?:[^a-z+.-:]|$))/i,
+    ADD_TAGS: ['mx-reply']
 }
 
 export function parseHTML(html) {