diff --git includes/backup_migrate.drush.inc includes/backup_migrate.drush.inc
index 59744fb..8915f4b 100644
--- includes/backup_migrate.drush.inc
+++ includes/backup_migrate.drush.inc
@@ -149,7 +149,7 @@ function backup_migrate_drush_sources() {
 /**
  * Get a list of available destinations with the given op.
  */
-function _backup_migrate_drush_destinations($op = NULL) {
+function _backup_migrate_drush_destinations($op = 'all') {
   backup_migrate_include('destinations');
   $rows = array(array(dt('ID'), dt('Name'), dt('Operations')));
   foreach (backup_migrate_get_destinations($op) as $destination) {