--- services.install.orig	2009-04-15 15:54:19.000000000 +0200
+++ services.install	2009-04-15 15:54:56.000000000 +0200
@@ -43,10 +43,8 @@ function services_schema() {
     'fields' => array(
       'timestamp' => array(
         'description' => 'The timestamp used with the Nonce.',
-        'type'        => 'varchar',
-        'length'      => 32,
+        'type'        => 'datetime',
         'not null'    => TRUE,
-        'default'     => ''
       ),
       'nonce' => array(
         'description' => 'The random string used on the request.',