diff --git a/commands/pm/version_control/backup.inc b/commands/pm/version_control/backup.inc
index d46d490..1bcf4a5 100644
--- a/commands/pm/version_control/backup.inc
+++ b/commands/pm/version_control/backup.inc
@@ -43,7 +43,7 @@ class drush_pm_version_control_backup implements drush_pm_version_control {
     if (drush_get_option('no-backup', FALSE)) {
       return;
     }
-    if (drush_move_dir($project['backup_target'], $project['full_project_path'])) {
+    if (drush_move_dir($project['backup_target'], $project['full_project_path'], TRUE)) {
       return drush_log(dt("Backups were restored successfully."), 'ok');
     }
     return drush_set_error('DRUSH_PM_BACKUP_ROLLBACK_FAILED', dt('Could not restore backup and rollback from failed upgrade. You will need to resolve manually.'));