diff --git a/admin/com_stations/sql/install.mysql.utf8.sql b/admin/com_stations/sql/install.mysql.utf8.sql
index 7b8f6e1..485736f 100644
--- a/admin/com_stations/sql/install.mysql.utf8.sql
+++ b/admin/com_stations/sql/install.mysql.utf8.sql
@@ -13,7 +13,7 @@ CREATE TABLE IF NOT EXISTS `#__stations_destinations` (
                                                           `lat` varchar(200) NOT NULL DEFAULT '',
                                                           `long` varchar(200) NOT NULL DEFAULT '',
                                                           `published` tinyint(1) NOT NULL DEFAULT 0,
-                                                          `checked_out` int(11) DEFAULT NULL DEFAULT 0,
+                                                          `checked_out` int(11) NOT NULL DEFAULT 0,
                                                           `checked_out_time` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
                                                           `txt` text NOT NULL DEFAULT '',
                                                           `picture` varchar(255) NOT NULL DEFAULT '',
diff --git a/admin/com_stations/sql/updates/mysql/3.3.3.sql b/admin/com_stations/sql/updates/mysql/3.3.3.sql
index d9cc275..657e2ac 100644
--- a/admin/com_stations/sql/updates/mysql/3.3.3.sql
+++ b/admin/com_stations/sql/updates/mysql/3.3.3.sql
@@ -1,6 +1,6 @@
 ALTER TABLE `#__stations_destinations` CHANGE `frn_id` `frn_id` INT(5) NULL DEFAULT NULL,
 CHANGE `checked_out_time` `checked_out_time` DATETIME NOT NULL DEFAULT '0000-00-00 00:00:00',
-CHANGE `checked_out` `checked_out` DEFAULT NULL DEFAULT 0,
+CHANGE `checked_out` `checked_out` NOT NULL DEFAULT 0,
 CHANGE `name` `name` VARCHAR(100)  NOT NULL DEFAULT '',
 CHANGE `alias` `alias` VARCHAR(180)  NOT NULL DEFAULT '',
 CHANGE `address` `address` VARCHAR(200)  NOT NULL DEFAULT '',