diff --git a/installer/data/mysql/kohastructure.sql b/installer/data/mysql/kohastructure.sql
index ec0f45d0b0..a75cb090f3 100644
--- a/installer/data/mysql/kohastructure.sql
+++ b/installer/data/mysql/kohastructure.sql
@@ -388,7 +388,7 @@ CREATE TABLE `biblioitems` (
   `volume` mediumtext,
   `number` mediumtext,
   `itemtype` varchar(10) default NULL,
-  `isbn` varchar(14) default NULL,
+  `isbn` varchar(30) default NULL,
   `issn` varchar(9) default NULL,
   `publicationyear` text,
   `publishercode` varchar(255) default NULL,
@@ -801,7 +801,7 @@ CREATE TABLE `deletedbiblioitems` (
   `volume` mediumtext,
   `number` mediumtext,
   `itemtype` varchar(10) default NULL,
-  `isbn` varchar(14) default NULL,
+  `isbn` varchar(30) default NULL,
   `issn` varchar(9) default NULL,
   `publicationyear` text,
   `publishercode` varchar(255) default NULL,
@@ -1066,7 +1066,7 @@ CREATE TABLE `import_biblios` (
   `original_source` varchar(25) default NULL,
   `title` varchar(128) default NULL,
   `author` varchar(80) default NULL,
-  `isbn` varchar(14) default NULL,
+  `isbn` varchar(30) default NULL,
   `issn` varchar(9) default NULL,
   `has_items` tinyint(1) NOT NULL default 0,
   CONSTRAINT `import_biblios_ibfk_1` FOREIGN KEY (`import_record_id`) 
@@ -1951,7 +1951,7 @@ CREATE TABLE `suggestions` (
   `volumedesc` varchar(255) default NULL,
   `publicationyear` smallint(6) default 0,
   `place` varchar(255) default NULL,
-  `isbn` varchar(10) default NULL,
+  `isbn` varchar(30) default NULL,
   `mailoverseeing` smallint(1) default 0,
   `biblionumber` int(11) default NULL,
   `reason` text,