diff --git a/odoo/tools/mail.py b/odoo/tools/mail.py
index 3eec9187926..8391b44f01f 100644
--- a/odoo/tools/mail.py
+++ b/odoo/tools/mail.py
@@ -392,6 +392,7 @@ def html2plaintext(html, body_id=None, encoding='utf-8'):
     html = html.replace('>', '>')
     html = html.replace('&lt;', '<')
     html = html.replace('&amp;', '&')
+    html = html.replace('&nbsp;', '\N{NO-BREAK SPACE}')
 
     # strip all lines
     html = '\n'.join([x.strip() for x in html.splitlines()])