diff --git a/addons/hr_timesheet_sheet/hr_timesheet_sheet_data.xml b/addons/hr_timesheet_sheet/hr_timesheet_sheet_data.xml
index 0a666752195..046fd7fe3d0 100644
--- a/addons/hr_timesheet_sheet/hr_timesheet_sheet_data.xml
+++ b/addons/hr_timesheet_sheet/hr_timesheet_sheet_data.xml
@@ -2,7 +2,7 @@
 <openerp>
     <data noupdate="1">
         <!-- Notify all employees of module installation -->
-        <function model="mail.group" name="message_append_post">
+        <function model="mail.group" name="message_post">
             <!-- ids, subject, body, parent_id=False, type='notification', content_subtype='html' -->
             <value eval="[ref('mail.group_all_employees')]"/>
             <value>From the top menu "Human Resources", encode and validate timesheets and attendances.</value>