diff --git a/install/db/173-database.php b/install/db/173-database.php
new file mode 100644
index 000000000..2ff3c59b5
--- /dev/null
+++ b/install/db/173-database.php
@@ -0,0 +1,20 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | This file is part of Piwigo.                                          |
+// |                                                                       |
+// | For copyright and license information, please view the COPYING.txt    |
+// | file that was distributed with this source code.                      |
+// +-----------------------------------------------------------------------+
+
+if (!defined('PHPWG_ROOT_PATH'))
+{
+  die('Hacking attempt!');
+}
+
+$upgrade_description = 'increase history.IP length from VARCHAR(16) to CHAR(39), IPv6 compatible';
+
+$query = 'ALTER TABLE `'.PREFIX_TABLE.'history` CHANGE `IP` `IP` char(39) NOT NULL default \'\';';
+pwg_query($query);
+
+echo "\n".$upgrade_description."\n";
+?>
diff --git a/install/piwigo_structure-mysql.sql b/install/piwigo_structure-mysql.sql
index 664f0836e..ca47a8420 100644
--- a/install/piwigo_structure-mysql.sql
+++ b/install/piwigo_structure-mysql.sql
@@ -143,7 +143,7 @@ CREATE TABLE `piwigo_history` (
   `date` date NOT NULL default '1970-01-01',
   `time` time NOT NULL default '00:00:00',
   `user_id` mediumint(8) unsigned NOT NULL default '0',
-  `IP` varchar(15) NOT NULL default '',
+  `IP` char(39) NOT NULL default '',
   `section` enum('categories','tags','search','list','favorites','most_visited','best_rated','recent_pics','recent_cats') default NULL,
   `category_id` smallint(5) default NULL,
   `search_id` int(10) unsigned default NULL,