diff --git a/lib/SimpleSAML/Database.php b/lib/SimpleSAML/Database.php
index 636e6abbdf6d3d3004e5aa5e102451f75f58b3e8..0ef90b7923513b498a3a1c6dcb3fec4af76bd0ca 100644
--- a/lib/SimpleSAML/Database.php
+++ b/lib/SimpleSAML/Database.php
@@ -192,7 +192,7 @@ class Database
      * @param array  $params Parameters
      *
      * @throws \Exception If an error happens while trying to execute the query.
-     * @return \PDOStatement object
+     * @return bool|\PDOStatement object
      */
     private function query($db, $stmt, $params)
     {