diff --git a/install/create_tables-innodb.sql b/install/create_tables-innodb.sql
index ce1447a67..50f677c2c 100644
--- a/install/create_tables-innodb.sql
+++ b/install/create_tables-innodb.sql
@@ -247,6 +247,7 @@ CREATE TABLE `tblDocumentContent` (
   `fileType` varchar(10) NOT NULL default '',
   `mimeType` varchar(100) NOT NULL default '',
   `fileSize` BIGINT,
+  `checksum` char(32),
   PRIMARY KEY  (`id`),
   UNIQUE (`document`, `version`),
   CONSTRAINT `tblDocumentContent_document` FOREIGN KEY (`document`) REFERENCES `tblDocuments` (`id`)
diff --git a/install/create_tables-sqlite3.sql b/install/create_tables-sqlite3.sql
index 5e68a9e77..4361a2283 100644
--- a/install/create_tables-sqlite3.sql
+++ b/install/create_tables-sqlite3.sql
@@ -220,6 +220,7 @@ CREATE TABLE `tblDocumentContent` (
   `fileType` varchar(10) NOT NULL default '',
   `mimeType` varchar(70) NOT NULL default '',
   `fileSize` INTEGER,
+  `checksum` char(32),
   UNIQUE (`document`,`version`)
 ) ;
 
diff --git a/install/update-4.0.0/update.sql b/install/update-4.0.0/update.sql
index aeffdd713..313572890 100644
--- a/install/update-4.0.0/update.sql
+++ b/install/update-4.0.0/update.sql
@@ -8,6 +8,8 @@ ALTER TABLE tblMandatoryApprovers ADD CONSTRAINT `tblMandatoryApprovers_user` FO
 
 ALTER TABLE tblDocumentContent ADD COLUMN `fileSize` bigint;
 
+ALTER TABLE tblDocumentContent ADD COLUMN `checksum` char(32);
+
 ALTER TABLE tblUsers ADD COLUMN `quota` bigint;
 
 ALTER TABLE tblSessions ADD COLUMN `clipboard` text DEFAULT '';