diff --git a/Civi/Api4/Event/Events.php b/Civi/Api4/Event/Events.php
index b42618db6987..c5247695c5fb 100644
--- a/Civi/Api4/Event/Events.php
+++ b/Civi/Api4/Event/Events.php
@@ -28,4 +28,10 @@ class Events {
    */
   const SCHEMA_MAP_BUILD = 'api.schema_map.build';
 
+  /**
+   * Add back POST_SELECT_QUERY const due to Joomla upgrade failure
+   * https://lab.civicrm.org/dev/joomla/-/issues/28#note_39487
+   */
+  const POST_SELECT_QUERY = 'api.select_query.post';
+
 }