diff --git a/program/lib/Roundcube/rcube_db.php b/program/lib/Roundcube/rcube_db.php
index 9283bb0d4..3e4617948 100644
--- a/program/lib/Roundcube/rcube_db.php
+++ b/program/lib/Roundcube/rcube_db.php
@@ -426,7 +426,7 @@ class rcube_db
      *
      * @param mixed $result Optional query handle
      *
-     * @return int Number of rows or false on failure
+     * @return int Number of (matching) rows
      */
     public function affected_rows($result = null)
     {