diff --git a/addons/mail/mail_mail_view.xml b/addons/mail/mail_mail_view.xml
index e1ac2e652b2..1eec45843c3 100644
--- a/addons/mail/mail_mail_view.xml
+++ b/addons/mail/mail_mail_view.xml
@@ -17,7 +17,7 @@
                         <label for="subject" class="oe_edit_only"/>
                         <h2><field name="subject"/></h2>
                         <div style="vertical-align: top;">
-                            by <field name="author_id" class="oe_inline" string="User"/> on <field name="date" class="oe_inline"/>
+                            by <field name="author_id" class="oe_inline" string="User"/> on <field name="date" readonly="1" class="oe_inline"/>
                             <button name="%(action_email_compose_message_wizard)d" string="Reply" type="action" icon="terp-mail-replied"
                                 context="{'default_composition_mode':'reply', 'default_parent_id': mail_message_id}" states='received,sent,exception,cancel'/>
                         </div>
diff --git a/addons/mail/mail_message.py b/addons/mail/mail_message.py
index 275c43f4b37..5b716a14ef2 100644
--- a/addons/mail/mail_message.py
+++ b/addons/mail/mail_message.py
@@ -151,7 +151,7 @@ class mail_message(osv.Model):
             string='Notifications', auto_join=True,
             help='Technical field holding the message notifications. Use notified_partner_ids to access notified partners.'),
         'subject': fields.char('Subject'),
-        'date': fields.datetime('Date', readonly=1),
+        'date': fields.datetime('Date'),
         'message_id': fields.char('Message-Id', help='Message unique identifier', select=1, readonly=1),
         'body': fields.html('Contents', help='Automatically sanitized HTML contents'),
         'to_read': fields.function(_get_to_read, fnct_search=_search_to_read,