diff --git a/util/grub-install.c b/util/grub-install.c
index 7b04bd3c5..1c0ece7f1 100644
--- a/util/grub-install.c
+++ b/util/grub-install.c
@@ -1835,6 +1835,7 @@ main (int argc, char *argv[])
 	    {
 	      if (write_to_disk (ins_dev, imgfile))
 		grub_util_error ("%s", _("failed to copy Grub to the PReP partition"));
+	      grub_set_install_backup_ponr ();
 	    }
 	  else
 	    {