diff --git a/components/db_ido_mysql/schema/mysql.sql b/components/db_ido_mysql/schema/mysql.sql
index 32f320cef..dc57b8e73 100644
--- a/components/db_ido_mysql/schema/mysql.sql
+++ b/components/db_ido_mysql/schema/mysql.sql
@@ -396,7 +396,7 @@ CREATE TABLE IF NOT EXISTS icinga_downtimehistory (
   internal_downtime_id bigint unsigned default 0,
   triggered_by_id bigint unsigned default 0,
   is_fixed smallint default 0,
-  duration smallint default 0,
+  duration bigint(20) default 0,
   scheduled_start_time timestamp  default '0000-00-00 00:00:00',
   scheduled_end_time timestamp  default '0000-00-00 00:00:00',
   was_started smallint default 0,
@@ -952,7 +952,7 @@ CREATE TABLE IF NOT EXISTS icinga_scheduleddowntime (
   internal_downtime_id bigint unsigned default 0,
   triggered_by_id bigint unsigned default 0,
   is_fixed smallint default 0,
-  duration smallint default 0,
+  duration bigint(20) default 0,
   scheduled_start_time timestamp  default '0000-00-00 00:00:00',
   scheduled_end_time timestamp  default '0000-00-00 00:00:00',
   was_started smallint default 0,