diff --git a/op/op.SearchFulltext.php b/op/op.SearchFulltext.php
index 0f4d64841..3b5d3f2dc 100644
--- a/op/op.SearchFulltext.php
+++ b/op/op.SearchFulltext.php
@@ -122,6 +122,8 @@ if($settings->_enableFullSearch) {
 	else
 		require_once('LetoDMS/Lucene.php');
 }
+
+Zend_Search_Lucene_Search_QueryParser::setDefaultEncoding('utf-8');
 $index = Zend_Search_Lucene::open($settings->_luceneDir);
 $lucenesearch = new LetoDMS_Lucene_Search($index);
 $hits = $lucenesearch->search($query, $owner ? $owner->getLogin() : '', '', $categories);