diff --git a/install/db/23-database.php b/install/db/23-database.php
new file mode 100644
index 000000000..a57568e5e
--- /dev/null
+++ b/install/db/23-database.php
@@ -0,0 +1,50 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | PhpWebGallery - a PHP based picture gallery                           |
+// | Copyright (C) 2002-2003 Pierrick LE GALL - pierrick@phpwebgallery.net |
+// | Copyright (C) 2003-2005 PhpWebGallery Team - http://phpwebgallery.net |
+// +-----------------------------------------------------------------------+
+// | branch        : BSF (Best So Far)
+// | file          : $RCSfile$
+// | last update   : $Date: 2005-09-21 00:04:57 +0200 (mer, 21 sep 2005) $
+// | last modifier : $Author: plg $
+// | revision      : $Revision: 870 $
+// +-----------------------------------------------------------------------+
+// | This program is free software; you can redistribute it and/or modify  |
+// | it under the terms of the GNU General Public License as published by  |
+// | the Free Software Foundation                                          |
+// |                                                                       |
+// | This program is distributed in the hope that it will be useful, but   |
+// | WITHOUT ANY WARRANTY; without even the implied warranty of            |
+// | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU      |
+// | General Public License for more details.                              |
+// |                                                                       |
+// | You should have received a copy of the GNU General Public License     |
+// | along with this program; if not, write to the Free Software           |
+// | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
+// | USA.                                                                  |
+// +-----------------------------------------------------------------------+
+
+if (!defined('PHPWG_ROOT_PATH'))
+{
+  die('Hacking attempt!');
+}
+
+$upgrade_description = 'index images_i1 on storage_category_id comes back';
+
+$query = '
+ALTER TABLE '.PREFIX_TABLE.'images
+  ADD INDEX images_i1(storage_category_id)
+;';
+pwg_query($query);
+
+// +-----------------------------------------------------------------------+
+// |                           End notification                            |
+// +-----------------------------------------------------------------------+
+
+echo
+"\n"
+.$upgrade_description
+."\n"
+;
+?>
diff --git a/install/phpwebgallery_structure.sql b/install/phpwebgallery_structure.sql
index dbc7b2335..189831bbe 100644
--- a/install/phpwebgallery_structure.sql
+++ b/install/phpwebgallery_structure.sql
@@ -172,7 +172,8 @@ CREATE TABLE `phpwebgallery_images` (
   KEY `images_i2` (`date_available`),
   KEY `images_i3` (`average_rate`),
   KEY `images_i4` (`hit`),
-  KEY `images_i5` (`date_creation`)
+  KEY `images_i5` (`date_creation`),
+  KEY `images_i1` (`storage_category_id`)
 ) TYPE=MyISAM;
 
 --