diff --git a/src/include/86box/machine.h b/src/include/86box/machine.h
index 5a552d6eb..4469b55c2 100644
--- a/src/include/86box/machine.h
+++ b/src/include/86box/machine.h
@@ -571,6 +571,7 @@ extern int machine_at_r418_init(const machine_t *);
 extern int machine_at_ls486e_init(const machine_t *);
 extern int machine_at_4dps_init(const machine_t *);
 extern int machine_at_ms4144_init(const machine_t *);
+extern int machine_at_acerp3_init(const machine_t *);
 extern int machine_at_4saw2_init(const machine_t *);
 extern int machine_at_m4li_init(const machine_t *);
 extern int machine_at_alfredo_init(const machine_t *);