diff --git a/program/lib/Roundcube/rcube_imap.php b/program/lib/Roundcube/rcube_imap.php
index 44a79c8e6..d1d1fbf32 100644
--- a/program/lib/Roundcube/rcube_imap.php
+++ b/program/lib/Roundcube/rcube_imap.php
@@ -1384,7 +1384,7 @@ class rcube_imap extends rcube_storage
     public function index_direct($folder, $sort_field = null, $sort_order = null, $search = null)
     {
         if (!empty($search)) {
-            $search = $this->search_set->get_compressed();
+            $search = $search->get_compressed();
         }
 
         // use message index sort as default sorting