diff --git a/installer/data/mysql/kohastructure.sql b/installer/data/mysql/kohastructure.sql
index 92ab713f15..f98438b4e0 100644
--- a/installer/data/mysql/kohastructure.sql
+++ b/installer/data/mysql/kohastructure.sql
@@ -181,7 +181,7 @@ CREATE TABLE `biblioitems` ( -- information related to bibliographic records in
   `cn_sort` varchar(30) default NULL, -- normalized version of the call number used for sorting
   `agerestriction` varchar(255) default NULL, -- target audience/age restriction from the bib record (MARC21 521$a)
   `totalissues` int(10),
-  `marcxml` longtext NOT NULL, -- full bibliographic MARC record in MARCXML
+  `marcxml` longtext, -- full bibliographic MARC record in MARCXML
   PRIMARY KEY  (`biblioitemnumber`),
   KEY `bibinoidx` (`biblioitemnumber`),
   KEY `bibnoidx` (`biblionumber`),
@@ -785,7 +785,7 @@ CREATE TABLE `deletedbiblioitems` ( -- information about bibliographic records t
   `cn_sort` varchar(30) default NULL, -- normalized version of the call number used for sorting
   `agerestriction` varchar(255) default NULL, -- target audience/age restriction from the bib record (MARC21 521$a)
   `totalissues` int(10),
-  `marcxml` longtext NOT NULL, -- full bibliographic MARC record in MARCXML
+  `marcxml` longtext, -- full bibliographic MARC record in MARCXML
   PRIMARY KEY  (`biblioitemnumber`),
   KEY `bibinoidx` (`biblioitemnumber`),
   KEY `bibnoidx` (`biblionumber`),
diff --git a/installer/data/mysql/updatedatabase.pl b/installer/data/mysql/updatedatabase.pl
index ec1eb017a0..6474da2f4e 100755
--- a/installer/data/mysql/updatedatabase.pl
+++ b/installer/data/mysql/updatedatabase.pl
@@ -8546,6 +8546,20 @@ if ( CheckVersion($DBversion) ) {
 }
 
 
+$DBversion = "3.19.00.XXX";
+if(CheckVersion($DBversion)) {
+    $dbh->do(q{
+        ALTER TABLE biblioitems MODIFY COLUMN marcxml longtext
+    });
+
+    $dbh->do(q{
+        ALTER TABLE deletedbiblioitems MODIFY COLUMN marcxml longtext
+    });
+
+    print "Upgrade to $DBversion done (Bug 13523 - Remove NOT NULL restriction on field marcxml due to mysql STRICT_TRANS_TABLES)\n";
+    SetVersion($DBversion);
+}
+
 =head1 FUNCTIONS
 
 =head2 TableExists($table)