diff --git a/app/extensions/extension_edit.php b/app/extensions/extension_edit.php
index 67cba70348..ef1dcf6e8c 100644
--- a/app/extensions/extension_edit.php
+++ b/app/extensions/extension_edit.php
@@ -730,6 +730,7 @@
 
 //set the defaults
 	if (strlen($limit_max) == 0) { $limit_max = '5'; }
+	if (strlen($limit_destination) == 0) { $limit_destination = 'error/user_busy'; }
 	if (strlen($call_timeout) == 0) { $call_timeout = '30'; }
 	if (strlen($call_screen_enabled) == 0) { $call_screen_enabled = 'false'; }