diff --git a/hw/riscv/sifive_u.c b/hw/riscv/sifive_u.c
index a2495b5ae7..e4c814a3ea 100644
--- a/hw/riscv/sifive_u.c
+++ b/hw/riscv/sifive_u.c
@@ -713,36 +713,20 @@ static void sifive_u_machine_set_start_in_flash(Object *obj, bool value, Error *
     s->start_in_flash = value;
 }
 
-static void sifive_u_machine_get_uint32_prop(Object *obj, Visitor *v,
-                                             const char *name, void *opaque,
-                                             Error **errp)
-{
-    visit_type_uint32(v, name, (uint32_t *)opaque, errp);
-}
-
-static void sifive_u_machine_set_uint32_prop(Object *obj, Visitor *v,
-                                             const char *name, void *opaque,
-                                             Error **errp)
-{
-    visit_type_uint32(v, name, (uint32_t *)opaque, errp);
-}
-
 static void sifive_u_machine_instance_init(Object *obj)
 {
     SiFiveUState *s = RISCV_U_MACHINE(obj);
 
     s->start_in_flash = false;
     s->msel = 0;
-    object_property_add(obj, "msel", "uint32",
-                        sifive_u_machine_get_uint32_prop,
-                        sifive_u_machine_set_uint32_prop, NULL, &s->msel);
+    object_property_add_uint32_ptr(obj, "msel", &s->msel,
+                                   OBJ_PROP_FLAG_READWRITE);
     object_property_set_description(obj, "msel",
                                     "Mode Select (MSEL[3:0]) pin state");
 
     s->serial = OTP_SERIAL;
-    object_property_add(obj, "serial", "uint32",
-                        sifive_u_machine_get_uint32_prop,
-                        sifive_u_machine_set_uint32_prop, NULL, &s->serial);
+    object_property_add_uint32_ptr(obj, "serial", &s->serial,
+                                   OBJ_PROP_FLAG_READWRITE);
     object_property_set_description(obj, "serial", "Board serial number");
 }