diff --git a/src/include/86box/machine.h b/src/include/86box/machine.h
index c8166a973..1f123e9f5 100644
--- a/src/include/86box/machine.h
+++ b/src/include/86box/machine.h
@@ -675,6 +675,7 @@ extern int machine_at_optiplexgxl_init(const machine_t *);
 extern int machine_at_zappa_init(const machine_t *);
 extern int machine_at_powermatev_init(const machine_t *);
 extern int machine_at_hawk_init(const machine_t *);
+extern int machine_at_d858_init(const machine_t *);
 extern int machine_at_pt2000_init(const machine_t *);
 
 extern int machine_at_pat54pv_init(const machine_t *);