diff --git a/odoo/tools/mail.py b/odoo/tools/mail.py
index 9c57c28e3dc..6e552a6962d 100644
--- a/odoo/tools/mail.py
+++ b/odoo/tools/mail.py
@@ -32,7 +32,7 @@ tags_to_kill = ['base', 'embed', 'frame', 'head', 'iframe', 'link', 'meta',
 tags_to_remove = ['html', 'body']
 
 # allow new semantic HTML5 tags
-allowed_tags = clean.defs.tags | frozenset('article section header footer hgroup nav aside figure main'.split() + [etree.Comment])
+allowed_tags = clean.defs.tags | frozenset('article bdi section header footer hgroup nav aside figure main'.split() + [etree.Comment])
 safe_attrs = clean.defs.safe_attrs | frozenset(
     ['style',
      'data-o-mail-quote',  # quote detection