diff --git a/program/lib/Roundcube/db/sqlsrv.php b/program/lib/Roundcube/db/sqlsrv.php
index b41ea6ce7..c49704ce7 100644
--- a/program/lib/Roundcube/db/sqlsrv.php
+++ b/program/lib/Roundcube/db/sqlsrv.php
@@ -1,90 +1,101 @@
 <?php
 
 /**
  +-----------------------------------------------------------------------+
  | This file is part of the Roundcube Webmail client                     |
  |                                                                       |
  | Copyright (C) The Roundcube Dev Team                                  |
  |                                                                       |
  | Licensed under the GNU General Public License version 3 or            |
  | any later version with exceptions for skins & plugins.                |
  | See the README file for a full license statement.                     |
  |                                                                       |
  | PURPOSE:                                                              |
  |   Database wrapper class that implements PHP PDO functions            |
  |   for MS SQL Server database                                          |
  +-----------------------------------------------------------------------+
  | Author: Aleksander Machniak <alec@alec.pl>                            |
  +-----------------------------------------------------------------------+
 */
 
 /**
  * Database independent query interface
  * This is a wrapper for the PHP PDO
  *
  * @package    Framework
  * @subpackage Database
  */
 class rcube_db_sqlsrv extends rcube_db_mssql
 {
 
     /**
      * Get last inserted record ID
      *
      * @param string $table Table name (to find the incremented sequence)
      *
      * @return string|false The ID or False on failure
      */
     public function insert_id($table = '')
     {
         if (!$this->db_connected || $this->db_mode == 'r') {
             return false;
         }
 
         if ($table) {
-            $driver_version = $this->dbh->getAttribute(PDO::ATTR_DRIVER_VERSION);
+            // For some unknown reason the constant described in the driver docs
+            // might not exist, we'll fallback to PDO::ATTR_CLIENT_VERSION (#7564)
+            if (defined('PDO::ATTR_DRIVER_VERSION')) {
+                $driver_version = $this->dbh->getAttribute(PDO::ATTR_DRIVER_VERSION);
+            }
+            else if (defined('PDO::ATTR_CLIENT_VERSION')) {
+                $client_version = $this->dbh->getAttribute(PDO::ATTR_CLIENT_VERSION);
+                $driver_version = $client_version['ExtensionVer'];
+            }
+            else {
+                $driver_version = 5;
+            }
 
             // Starting from version 5 of the driver lastInsertId() method expects
             // a sequence name instead of a table name. We'll unset the argument
             // to get the last insert sequence (#7564)
             if (version_compare($driver_version, '5', '>=')) {
                 $table = null;
             }
             else {
                 // resolve table name
                 $table = $this->table_name($table);
             }
         }
 
         return $this->dbh->lastInsertId($table);
     }
 
     /**
      * Returns PDO DSN string from DSN array
      */
     protected function dsn_string($dsn)
     {
         $params = array();
         $result = 'sqlsrv:';
 
         if ($dsn['hostspec']) {
             $host = $dsn['hostspec'];
 
             if ($dsn['port']) {
                 $host .= ',' . $dsn['port'];
             }
 
             $params[] = 'Server=' . $host;
         }
 
         if ($dsn['database']) {
             $params[] = 'Database=' . $dsn['database'];
         }
 
         if (!empty($params)) {
             $result .= implode(';', $params);
         }
 
         return $result;
     }
 }