diff --git a/install-dev/data/db_structure.sql b/install-dev/data/db_structure.sql
index 41507f225..921ed7105 100644
--- a/install-dev/data/db_structure.sql
+++ b/install-dev/data/db_structure.sql
@@ -696,9 +696,9 @@ CREATE TABLE `PREFIX_employee` (
   `bo_width` int(10) unsigned NOT NULL DEFAULT 0,
   `bo_show_screencast` tinyint(1) NOT NULL default '1',
   `active` tinyint(1) unsigned NOT NULL default '0',
-  `id_last_order` tinyint(1) unsigned NOT NULL default '0',
-  `id_last_customer_message` tinyint(1) unsigned NOT NULL default '0',
-  `id_last_customer` tinyint(1) unsigned NOT NULL default '0',
+  `id_last_order` int(10) unsigned NOT NULL default '0',
+  `id_last_customer_message` int(10) unsigned NOT NULL default '0',
+  `id_last_customer` int(10) unsigned NOT NULL default '0',
   PRIMARY KEY  (`id_employee`),
   KEY `employee_login` (`email`,`passwd`),
   KEY `id_employee_passwd` (`id_employee`,`passwd`),
diff --git a/install-dev/upgrade/sql/1.5.0.9.sql b/install-dev/upgrade/sql/1.5.0.9.sql
index 0b4cf1b2f..b2d52d7c5 100644
--- a/install-dev/upgrade/sql/1.5.0.9.sql
+++ b/install-dev/upgrade/sql/1.5.0.9.sql
@@ -1 +1,7 @@
 SET NAMES 'utf8';
+
+ALTER TABLE `PREFIX_employee`
+	MODIFY COLUMN `id_last_order` INT(10) UNSIGNED NOT NULL DEFAULT 0,
+	MODIFY COLUMN `id_last_customer_message` INT(10) UNSIGNED NOT NULL DEFAULT 0,
+	MODIFY COLUMN `id_last_customer` INT(10) UNSIGNED NOT NULL DEFAULT 0;
+