diff --git a/hw/riscv/opentitan.c b/hw/riscv/opentitan.c
index 294955eeea..7d7159ea30 100644
--- a/hw/riscv/opentitan.c
+++ b/hw/riscv/opentitan.c
@@ -118,7 +118,7 @@ static void opentitan_machine_class_init(MachineClass *mc)
     mc->default_ram_size = ibex_memmap[IBEX_DEV_RAM].size;
 }
 
-DEFINE_MACHINE("opentitan", opentitan_machine_class_init)
+DEFINE_MACHINE(TYPE_OPENTITAN_MACHINE, opentitan_machine_class_init)
 
 static void lowrisc_ibex_soc_init(Object *obj)
 {
diff --git a/include/hw/riscv/opentitan.h b/include/hw/riscv/opentitan.h
index c40b05052a..fd70226ed8 100644
--- a/include/hw/riscv/opentitan.h
+++ b/include/hw/riscv/opentitan.h
@@ -53,6 +53,8 @@ struct LowRISCIbexSoCState {
     MemoryRegion flash_alias;
 };
 
+#define TYPE_OPENTITAN_MACHINE "opentitan"
+
 typedef struct OpenTitanState {
     /*< private >*/
     SysBusDevice parent_obj;