diff --git a/comment_notify.install b/comment_notify.install
index bf71007..76f3525 100644
--- a/comment_notify.install
+++ b/comment_notify.install
@@ -300,4 +300,13 @@ function comment_notify_update_6005() {
       'disp-width' => '11'));
 
   return $ret;
-}
\ No newline at end of file
+}
+
+/**
+ * Fix a missing default causes warnings for Postgresql and some MySQL.
+ */
+function comment_notify_update_6006() {
+  $ret = array();
+  db_change_field($ret, 'comment_notify', 'notified', 'notified',  array('type' => 'int', 'size' => 'small', 'unsigned' => TRUE, 'not null' => TRUE, 'default' => 0));
+  return $ret;
+}