diff --git a/CRM/Contact/Form/Location.php b/CRM/Contact/Form/Location.php
index 206e2e5abcdd..53bbd87d58ca 100644
--- a/CRM/Contact/Form/Location.php
+++ b/CRM/Contact/Form/Location.php
@@ -25,6 +25,7 @@ class CRM_Contact_Form_Location {
    * @param CRM_Core_Form $form
    */
   public static function buildQuickForm(&$form) {
+    CRM_Core_Error::deprecatedFunctionWarning('internal core function, take a copy');
     // required for subsequent AJAX requests.
     $ajaxRequestBlocks = [];
     $generateAjaxRequest = 0;