diff --git a/mail_tracking/i18n/mail_tracking.pot b/mail_tracking/i18n/mail_tracking.pot
index 8914c18..050c540 100644
--- a/mail_tracking/i18n/mail_tracking.pot
+++ b/mail_tracking/i18n/mail_tracking.pot
@@ -265,6 +265,7 @@ msgid "Failed"
 msgstr ""
 
 #. module: mail_tracking
+#: model:ir.model.fields,field_description:mail_tracking.field_calendar_event__failed_message_ids
 #: model:ir.model.fields,field_description:mail_tracking.field_event_event__failed_message_ids
 #: model:ir.model.fields,field_description:mail_tracking.field_event_registration__failed_message_ids
 #: model:ir.model.fields,field_description:mail_tracking.field_mail_blacklist__failed_message_ids