--- includes/database/mysql/schema.inc.orig	2010-11-16 08:45:40.000000000 -0500
+++ includes/database/mysql/schema.inc	2010-11-16 08:18:51.000000000 -0500
@@ -337,7 +337,7 @@ class DatabaseSchema_mysql extends Datab
     $this->connection->query($query);
     if (isset($spec['initial'])) {
       $this->connection->update($table)
-        ->fields(array($field, $spec['initial']))
+        ->fields(array($field => $spec['initial']))
         ->execute();
     }
     if ($fixnull) {