diff --git a/addons/mail/static/src/js/models/messages/message.js b/addons/mail/static/src/js/models/messages/message.js
index 8327f4011fd..ddc6230c77c 100644
--- a/addons/mail/static/src/js/models/messages/message.js
+++ b/addons/mail/static/src/js/models/messages/message.js
@@ -604,7 +604,7 @@ var Message =  AbstractMessage.extend(Mixins.EventDispatcherMixin, ServicesMixin
         _.each(emojis, function (emoji) {
             var unicode = emoji.unicode;
             var regexp = new RegExp("(?:^|\\s|<[a-z]*>)(" + unicode + ")(?=\\s|$|</[a-z]*>)", 'g');
-            var originalBody = self.body;
+            var originalBody = self._body;
             self._body = self._body.replace(regexp,
                 ' <span class="o_mail_emoji">' + unicode + '</span> ');
             // Idiot-proof limit. If the user had the amazing idea of