diff --git a/addons/im_livechat/static/src/js/im_livechat.js b/addons/im_livechat/static/src/js/im_livechat.js
index f6634c0665a..84e123a18bd 100644
--- a/addons/im_livechat/static/src/js/im_livechat.js
+++ b/addons/im_livechat/static/src/js/im_livechat.js
@@ -196,6 +196,7 @@ var LivechatButton = Widget.extend({
             date: moment(time.str_to_datetime(data.date)),
             is_needaction: false,
             is_note: data.is_note,
+            customer_email_data: []
         };
 
         // Compute displayed author name or email