diff --git a/install/create_tables-innodb.sql b/install/create_tables-innodb.sql
index c20fe34ff..d79c64020 100644
--- a/install/create_tables-innodb.sql
+++ b/install/create_tables-innodb.sql
@@ -704,7 +704,7 @@ CREATE TABLE tblWorkflows (
   `id` int(11) NOT NULL auto_increment,
   `name` text NOT NULL,
   `initstate` int(11) NOT NULL,
-  `layoutdata` text NOT NULL,
+  `layoutdata` text default NULL,
   PRIMARY KEY  (`id`),
   CONSTRAINT `tblWorkflow_initstate` FOREIGN KEY (`initstate`) REFERENCES `tblWorkflowStates` (`id`) ON DELETE CASCADE
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
diff --git a/install/create_tables-sqlite3.sql b/install/create_tables-sqlite3.sql
index 209141c11..ac939edf1 100644
--- a/install/create_tables-sqlite3.sql
+++ b/install/create_tables-sqlite3.sql
@@ -73,7 +73,7 @@ CREATE TABLE `tblUsers` (
   `comment` text NOT NULL,
   `role` INTEGER NOT NULL REFERENCES `tblRoles` (`id`),
   `hidden` INTEGER NOT NULL default '0',
-  `pwdExpiration` TEXT NOT NULL,
+  `pwdExpiration` TEXT default NULL,
   `loginfailures` INTEGER NOT NULL default '0',
   `disabled` INTEGER NOT NULL default '0',
   `quota` INTEGER,
@@ -251,7 +251,7 @@ CREATE TABLE `tblDocumentContent` (
   `mimeType` varchar(70) NOT NULL default '',
   `fileSize` INTEGER,
   `checksum` char(32),
-  `revisiondate` TEXT NOT NULL,
+  `revisiondate` TEXT default NULL,
   UNIQUE (`document`,`version`)
 ) ;
 
@@ -616,7 +616,7 @@ CREATE TABLE tblWorkflows (
   `id` INTEGER PRIMARY KEY AUTOINCREMENT,
   `name` text NOT NULL,
   `initstate` INTEGER NOT NULL REFERENCES `tblWorkflowStates` (`id`) ON DELETE CASCADE,
-  `layoutdata` text NOT NULL
+  `layoutdata` text default NULL
 ) ;
 
 -- --------------------------------------------------------