diff --git a/install/db/154-database.php b/install/db/154-database.php
index 726065540..79dd4f4ab 100644
--- a/install/db/154-database.php
+++ b/install/db/154-database.php
@@ -35,7 +35,7 @@ CREATE TABLE `'.PREFIX_TABLE.'activity` (
   `object_id` int(11) unsigned NOT NULL,
   `action` varchar(255) NOT NULL,
   `performed_by` mediumint(8) unsigned NOT NULL,
-  `occured_on` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  `occured_on` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
   `details` varchar(255) DEFAULT NULL,
   PRIMARY KEY (`activity_id`)
 ) ENGINE=MyISAM DEFAULT CHARSET=utf8
diff --git a/install/db/156-database.php b/install/db/156-database.php
new file mode 100644
index 000000000..5ed6b88df
--- /dev/null
+++ b/install/db/156-database.php
@@ -0,0 +1,40 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | Piwigo - a PHP based photo gallery                                    |
+// +-----------------------------------------------------------------------+
+// | Copyright(C) 2008-2016 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!');
+}
+
+$upgrade_description = 'bug fixing, change column type for activity.occured_on';
+
+$row = pwg_db_fetch_assoc(pwg_query('SHOW COLUMNS FROM `'.PREFIX_TABLE.'activity` LIKE "occured_on";'));
+if (!preg_match('/^TIMESTAMP/i', $row['Type']))
+{
+  $query = 'ALTER TABLE `'.PREFIX_TABLE.'activity` CHANGE `occured_on` `occured_on` TIMESTAMP DEFAULT CURRENT_TIMESTAMP;';
+  pwg_query($query);
+}
+
+echo "\n".$upgrade_description."\n";
+
+?>
diff --git a/install/piwigo_structure-mysql.sql b/install/piwigo_structure-mysql.sql
index f3e15a2e4..22d5ba706 100644
--- a/install/piwigo_structure-mysql.sql
+++ b/install/piwigo_structure-mysql.sql
@@ -17,7 +17,7 @@ CREATE TABLE `piwigo_activity` (
   `performed_by` mediumint(8) unsigned NOT NULL,
   `session_idx` varchar(255) NOT NULL,
   `ip_address` varchar(50) DEFAULT NULL,
-  `occured_on` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  `occured_on` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
   `details` varchar(255) DEFAULT NULL,
   PRIMARY KEY (`activity_id`)
 ) ENGINE=MyISAM;