diff --git a/addons/mail/mail_thread_view.xml b/addons/mail/mail_thread_view.xml
index 1721b3df1d4..6f557f263f9 100644
--- a/addons/mail/mail_thread_view.xml
+++ b/addons/mail/mail_thread_view.xml
@@ -67,7 +67,7 @@
                 'read_action': 'read', }""/>
             <field name="help" type="html">
                 <p>
-                    <b>No todo!</b>
+                    <b>No todo.</b>
                 </p><p>
                     When you process messages in your inbox, you can mark some
                     as <i>todo</i>. From this menu, you can process all your todo.