diff --git a/hw/ppc/mac_oldworld.c b/hw/ppc/mac_oldworld.c
index 0117ae17f5..1abf26b5b4 100644
--- a/hw/ppc/mac_oldworld.c
+++ b/hw/ppc/mac_oldworld.c
@@ -87,7 +87,6 @@ static void ppc_heathrow_init(MachineState *machine)
     const char *kernel_cmdline = machine->kernel_cmdline;
     const char *initrd_filename = machine->initrd_filename;
     const char *boot_device = machine->boot_order;
-    MemoryRegion *sysmem = get_system_memory();
     PowerPCCPU *cpu = NULL;
     CPUPPCState *env = NULL;
     char *filename;
@@ -129,12 +128,12 @@ static void ppc_heathrow_init(MachineState *machine)
         exit(1);
     }
 
-    memory_region_add_subregion(sysmem, 0, machine->ram);
+    memory_region_add_subregion(get_system_memory(), 0, machine->ram);
 
     /* allocate and load firmware ROM */
     memory_region_init_rom(bios, NULL, "ppc_heathrow.bios", PROM_SIZE,
                            &error_fatal);
-    memory_region_add_subregion(sysmem, PROM_BASE, bios);
+    memory_region_add_subregion(get_system_memory(), PROM_BASE, bios);
 
     if (!bios_name) {
         bios_name = PROM_FILENAME;