diff --git a/src/include/86box/machine.h b/src/include/86box/machine.h
index dd208b0ce..112d140f8 100644
--- a/src/include/86box/machine.h
+++ b/src/include/86box/machine.h
@@ -676,7 +676,6 @@ 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 *);