php notice

diff --git a/CRM/Admin/Page/AJAX.php b/CRM/Admin/Page/AJAX.php
index 012c529ef1af310c21c2f2c7ff59d0f76ee90eab..5552495c49798c7c1bdae3cf806a20e5ff2d7919 100644 (file)
--- a/CRM/Admin/Page/AJAX.php
+++ b/CRM/Admin/Page/AJAX.php
@@ -86,7 +86,7 @@ class CRM_Admin_Page_AJAX {
       $result[] = [
         'key' => $key,
         'value' => $allOptions[$key]['label'],
-        'adv_search_legacy' => $allOptions[$key]['adv_search_legacy'],
+        'adv_search_legacy' => $allOptions[$key]['adv_search_legacy'] ?? '',
       ];
     }
     return $result;