diff --git a/CRM/Upgrade/Incremental/MessageTemplates.php b/CRM/Upgrade/Incremental/MessageTemplates.php
index ece6e32606c..e04d4613cd9 100644
--- a/CRM/Upgrade/Incremental/MessageTemplates.php
+++ b/CRM/Upgrade/Incremental/MessageTemplates.php
@@ -79,6 +79,7 @@ protected function getTemplateUpdates() {
           ['name' => 'contribution_online_receipt', 'type' => 'html'],
           ['name' => 'event_online_receipt', 'type' => 'text'],
           ['name' => 'event_online_receipt', 'type' => 'html'],
+          ['name' => 'event_online_receipt', 'type' => 'subject'],
         ]
       ],
     ];