diff --git a/program/include/rcube_imap.php b/program/include/rcube_imap.php
index 7e2221884..9b507028c 100644
--- a/program/include/rcube_imap.php
+++ b/program/include/rcube_imap.php
@@ -674,7 +674,7 @@ class rcube_imap
       }
     else { // SEARCH searching result, need sorting
       $cnt = count($msgs);
-      if ($cnt > 300) { // experimantal best result
+      if ($cnt > 300 && $cnt > $this->page_size) { // experimantal value for best result
         // use memory less expensive (and quick) method for big result set
 	$a_index = $this->message_index($mailbox, $this->sort_field, $this->sort_order);
         // get messages uids for one page...