diff --git a/addons/rating_project/data/project_data.xml b/addons/rating_project/data/project_data.xml
index 5f7d4a09b7a..d60e24ef33c 100644
--- a/addons/rating_project/data/project_data.xml
+++ b/addons/rating_project/data/project_data.xml
@@ -53,7 +53,7 @@
                 <p>We appreciate your feedback. It helps us to improve continuously.</p>
             </td></tr>
             <tr><td style="padding:10px 20px">
-                <table style="width:100%;border-top:1px solid #e1e1e1;">
+                <table summary="o_mail_notification" style="width:100%;border-top:1px solid #e1e1e1;">
                     <tr>
                         <td style="text-align:center;">
                             <h2 style="font-weight:300;font-size:18px;">