Index: modules/system/system.install
===================================================================
RCS file: /cvs/drupal/drupal/modules/system/system.install,v
retrieving revision 1.430
diff -u -p -r1.430 system.install
--- modules/system/system.install	14 Dec 2009 10:36:26 -0000	1.430
+++ modules/system/system.install	24 Dec 2009 08:00:10 -0000
@@ -629,6 +629,9 @@ function system_schema() {
       ),
     ),
     'primary key' => array('type'),
+    'indexes' => array(
+      'title' => array('title'),
+    ),
   );
 
   // This table's name is plural as some versions of MySQL can't create a