diff --git a/hw/nios2/10m50_devboard.c b/hw/nios2/10m50_devboard.c
index bdc3ffd50d..dda4ab2bf5 100644
--- a/hw/nios2/10m50_devboard.c
+++ b/hw/nios2/10m50_devboard.c
@@ -38,6 +38,11 @@
 
 struct Nios2MachineState {
     MachineState parent_obj;
+
+    MemoryRegion phys_tcm;
+    MemoryRegion phys_tcm_alias;
+    MemoryRegion phys_ram;
+    MemoryRegion phys_ram_alias;
 };
 
 #define TYPE_NIOS2_MACHINE  MACHINE_TYPE_NAME("10m50-ghrd")
@@ -47,13 +52,10 @@ OBJECT_DECLARE_TYPE(Nios2MachineState, MachineClass, NIOS2_MACHINE)
 
 static void nios2_10m50_ghrd_init(MachineState *machine)
 {
+    Nios2MachineState *nms = NIOS2_MACHINE(machine);
     Nios2CPU *cpu;
     DeviceState *dev;
     MemoryRegion *address_space_mem = get_system_memory();
-    MemoryRegion *phys_tcm = g_new(MemoryRegion, 1);
-    MemoryRegion *phys_tcm_alias = g_new(MemoryRegion, 1);
-    MemoryRegion *phys_ram = g_new(MemoryRegion, 1);
-    MemoryRegion *phys_ram_alias = g_new(MemoryRegion, 1);
     ram_addr_t tcm_base = 0x0;
     ram_addr_t tcm_size = 0x1000;    /* 1 kiB, but QEMU limit is 4 kiB */
     ram_addr_t ram_base = 0x08000000;
@@ -62,22 +64,22 @@ static void nios2_10m50_ghrd_init(MachineState *machine)
     int i;
 
     /* Physical TCM (tb_ram_1k) with alias at 0xc0000000 */
-    memory_region_init_ram(phys_tcm, NULL, "nios2.tcm", tcm_size,
+    memory_region_init_ram(&nms->phys_tcm, NULL, "nios2.tcm", tcm_size,
                            &error_abort);
-    memory_region_init_alias(phys_tcm_alias, NULL, "nios2.tcm.alias",
-                             phys_tcm, 0, tcm_size);
-    memory_region_add_subregion(address_space_mem, tcm_base, phys_tcm);
+    memory_region_init_alias(&nms->phys_tcm_alias, NULL, "nios2.tcm.alias",
+                             &nms->phys_tcm, 0, tcm_size);
+    memory_region_add_subregion(address_space_mem, tcm_base, &nms->phys_tcm);
     memory_region_add_subregion(address_space_mem, 0xc0000000 + tcm_base,
-                                phys_tcm_alias);
+                                &nms->phys_tcm_alias);
 
     /* Physical DRAM with alias at 0xc0000000 */
-    memory_region_init_ram(phys_ram, NULL, "nios2.ram", ram_size,
+    memory_region_init_ram(&nms->phys_ram, NULL, "nios2.ram", ram_size,
                            &error_abort);
-    memory_region_init_alias(phys_ram_alias, NULL, "nios2.ram.alias",
-                             phys_ram, 0, ram_size);
-    memory_region_add_subregion(address_space_mem, ram_base, phys_ram);
+    memory_region_init_alias(&nms->phys_ram_alias, NULL, "nios2.ram.alias",
+                             &nms->phys_ram, 0, ram_size);
+    memory_region_add_subregion(address_space_mem, ram_base, &nms->phys_ram);
     memory_region_add_subregion(address_space_mem, 0xc0000000 + ram_base,
-                                phys_ram_alias);
+                                &nms->phys_ram_alias);
 
     /* Create CPU -- FIXME */
     cpu = NIOS2_CPU(cpu_create(TYPE_NIOS2_CPU));