diff --git a/sql/mysql/install/structure.sql b/sql/mysql/install/structure.sql
index 5673bdd..d5735f2 100644
--- a/sql/mysql/install/structure.sql
+++ b/sql/mysql/install/structure.sql
@@ -557,6 +557,7 @@ CREATE TABLE `documents` (
   `restore_folder_id` int(11) default NULL,
   `restore_folder_path` text,
   `checkedout` datetime default NULL,
+  `oem_no` varchar(255) default NULL,
   PRIMARY KEY  (`id`),
   KEY `creator_id` (`creator_id`),
   KEY `folder_id` (`folder_id`),
@@ -571,6 +572,7 @@ CREATE TABLE `documents` (
   KEY `full_path` (`full_path`(255)),
   KEY `immutable` (`immutable`),
   KEY `checkedout` (`checkedout`),
+  KEY `oem_no` (`oem_no`),
   CONSTRAINT `documents_ibfk_1` FOREIGN KEY (`creator_id`) REFERENCES `users` (`id`) ON DELETE SET NULL ON UPDATE SET NULL,
   CONSTRAINT `documents_ibfk_2` FOREIGN KEY (`folder_id`) REFERENCES `folders` (`id`) ON DELETE CASCADE ON UPDATE CASCADE,
   CONSTRAINT `documents_ibfk_3` FOREIGN KEY (`checked_out_user_id`) REFERENCES `users` (`id`) ON DELETE SET NULL ON UPDATE SET NULL,
diff --git a/sql/mysql/upgrade/3.5.2/oem_no.sql b/sql/mysql/upgrade/3.5.2/oem_no.sql
new file mode 100644
index 0000000..74462d6
--- /dev/null
+++ b/sql/mysql/upgrade/3.5.2/oem_no.sql
@@ -0,0 +1 @@
+ALTER TABLE documents ADD oem_no varchar(255) NULL, ADD INDEX (oem_no);
\ No newline at end of file