diff --git a/op/op.Ajax.php b/op/op.Ajax.php
index b95aac189..3a7154b98 100644
--- a/op/op.Ajax.php
+++ b/op/op.Ajax.php
@@ -642,6 +642,7 @@ switch($command) {
 					$indexconf['Indexer']::init($settings->_stopWordsFile);
 				} else {
 					$index = null;
+					$indexconf = null;
 				}
 
 				$controller = Controller::factory('AddDocument');