diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c
index 7c38a90480..4fa2bad248 100644
--- a/hw/riscv/virt.c
+++ b/hw/riscv/virt.c
@@ -992,8 +992,9 @@ static void create_fdt_rtc(RISCVVirtState *s,
     qemu_fdt_add_subnode(ms->fdt, name);
     qemu_fdt_setprop_string(ms->fdt, name, "compatible",
         "google,goldfish-rtc");
-    qemu_fdt_setprop_cells(ms->fdt, name, "reg",
-        0x0, s->memmap[VIRT_RTC].base, 0x0, s->memmap[VIRT_RTC].size);
+    qemu_fdt_setprop_sized_cells(ms->fdt, name, "reg",
+                                 2, s->memmap[VIRT_RTC].base,
+                                 2, s->memmap[VIRT_RTC].size);
     qemu_fdt_setprop_cell(ms->fdt, name, "interrupt-parent",
         irq_mmio_phandle);
     if (s->aia_type == VIRT_AIA_TYPE_NONE) {