diff --git a/addons/mail/static/src/css/mail.css b/addons/mail/static/src/css/mail.css
index e0d001a64fa..a912570c3de 100644
--- a/addons/mail/static/src/css/mail.css
+++ b/addons/mail/static/src/css/mail.css
@@ -230,7 +230,7 @@
     border-bottom: 1px solid #D2D9E7;
 }
 
-.openerp span.oe_mail_msg_body a.reduce, .openerp span.oe_mail_msg_body_short a.expand {
+.openerp a.oe_mail_expand, .openerp a.oe_mail_reduce {
     color: #4E43E7;
 }
 
diff --git a/addons/mail/static/src/js/mail.js b/addons/mail/static/src/js/mail.js
index 2081f8183b9..da0ac27e2ff 100644
--- a/addons/mail/static/src/js/mail.js
+++ b/addons/mail/static/src/js/mail.js
@@ -285,7 +285,7 @@ openerp.mail = function(session) {
             // body text manipulation
             record.body = this.do_clean_text(record.body);
             record.body = this.do_replace_internal_links(record.body);
-            this.$element.find('span.oe_mail_msg_body:last').expander();
+            this.$element.find('span.oe_mail_msg_body:last').expander({slicePoint: this.params.msg_more_limit, moreClass: 'oe_mail_expand', lesClass: 'oe_mail_reduce'});
             // format date according to the user timezone
             record.date = session.web.format_value(record.date, {type:"datetime"});
             // render