diff --git a/grub-core/net/net.c b/grub-core/net/net.c
index 8cad4fb6d..f69c67b64 100644
--- a/grub-core/net/net.c
+++ b/grub-core/net/net.c
@@ -2072,6 +2072,8 @@ GRUB_MOD_FINI(net)
 {
   grub_register_variable_hook ("net_default_server", 0, 0);
   grub_register_variable_hook ("pxe_default_server", 0, 0);
+  grub_register_variable_hook ("net_default_ip", 0, 0);
+  grub_register_variable_hook ("net_default_mac", 0, 0);
 
   grub_bootp_fini ();
   grub_dns_fini ();