Index: workflow.install
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/workflow/workflow.install,v
retrieving revision 1.13.2.2
diff -u -r1.13.2.2 workflow.install
--- workflow.install	7 Jan 2009 02:48:33 -0000	1.13.2.2
+++ workflow.install	5 Jun 2009 21:16:01 -0000
@@ -75,7 +75,7 @@
   );
   $schema['workflow_node_history'] = array(
     'fields' => array(
-      'hid'     => array('type' => 'serial'),
+      'hid'     => array('type' => 'serial', 'not null' => TRUE),
       'nid'     => array('type' => 'int', 'unsigned' => TRUE, 'not null' => TRUE, 'default' => 0, 'disp-width' => '10'),
       'old_sid' => array('type' => 'int', 'unsigned' => TRUE, 'not null' => TRUE, 'default' => 0, 'disp-width' => '10'),
       'sid'     => array('type' => 'int', 'unsigned' => TRUE, 'not null' => TRUE, 'default' => 0, 'disp-width' => '10'),