diff --git a/resources/switch.php b/resources/switch.php
index 94213d8cfa..550cb5de92 100644
--- a/resources/switch.php
+++ b/resources/switch.php
@@ -3629,7 +3629,7 @@ if (!function_exists('save_switch_xml')) {
 			save_dialplan_xml();
 		}
 		if (is_readable($_SESSION['switch']['extensions']['dir'])) {
-			require_once "app/extensions/resources/classes/extension.php";
+			require_once PROJECT_PATH."app/extensions/resources/classes/extension.php";
 			$extension = new extension;
 			$extension->xml();
 		}