diff --git a/install/db/126-database.php b/install/db/126-database.php
new file mode 100644
index 000000000..56edbcea5
--- /dev/null
+++ b/install/db/126-database.php
@@ -0,0 +1,48 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | Piwigo - a PHP based photo gallery                                    |
+// +-----------------------------------------------------------------------+
+// | Copyright(C) 2008-2012 Piwigo Team                  http://piwigo.org |
+// | Copyright(C) 2003-2008 PhpWebGallery Team    http://phpwebgallery.net |
+// | Copyright(C) 2002-2003 Pierrick LE GALL   http://le-gall.net/pierrick |
+// +-----------------------------------------------------------------------+
+// | 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!');
+}
+
+$upgrade_description = 'rename language sl_SL into sl_SI';
+
+include_once(PHPWG_ROOT_PATH.'include/constants.php');
+
+$query = '
+UPDATE '.USER_INFOS_TABLE.'
+  SET language = \'sl_SI\'
+  WHERE language = \'sl_SL\'
+;';
+pwg_query($query);
+
+$query = '
+UPDATE '.LANGUAGES_TABLE.'
+  SET id = \'sl_SI\'
+  WHERE id = \'sl_SL\'
+;';
+pwg_query($query);
+
+echo "\n".$upgrade_description."\n";
+?>
\ No newline at end of file
diff --git a/language/sl_SL/about.html b/language/sl_SI/about.html
similarity index 100%
rename from language/sl_SL/about.html
rename to language/sl_SI/about.html
diff --git a/language/sl_SL/admin.lang.php b/language/sl_SI/admin.lang.php
similarity index 100%
rename from language/sl_SL/admin.lang.php
rename to language/sl_SI/admin.lang.php
diff --git a/language/sl_SL/common.lang.php b/language/sl_SI/common.lang.php
similarity index 100%
rename from language/sl_SL/common.lang.php
rename to language/sl_SI/common.lang.php
diff --git a/language/sl_SI/iso.txt b/language/sl_SI/iso.txt
new file mode 100644
index 000000000..fbf4ad1f6
--- /dev/null
+++ b/language/sl_SI/iso.txt
@@ -0,0 +1 @@
+Sloven&scaron;čina [SI]
diff --git a/language/sl_SL/sl_SL.jpg b/language/sl_SI/sl_SI.jpg
similarity index 100%
rename from language/sl_SL/sl_SL.jpg
rename to language/sl_SI/sl_SI.jpg
diff --git a/language/sl_SL/iso.txt b/language/sl_SL/iso.txt
deleted file mode 100644
index eb954ba31..000000000
--- a/language/sl_SL/iso.txt
+++ /dev/null
@@ -1 +0,0 @@
-Sloven&scaron;čina [SL]
\ No newline at end of file