diff --git a/hw/m68k/q800.c b/hw/m68k/q800.c
index f9ecc1fbb0..ac8509ba6f 100644
--- a/hw/m68k/q800.c
+++ b/hw/m68k/q800.c
@@ -91,6 +91,9 @@
 #define Q800_NUBUS_SLOTS_AVAILABLE    (BIT(0x9) | BIT(0xc) | BIT(0xd) | \
                                        BIT(0xe))
 
+/* Quadra 800 machine ID */
+#define Q800_MACHINE_ID    0xa55a2bad
+
 
 static void main_cpu_reset(void *opaque)
 {
@@ -192,6 +195,27 @@ static const MemoryRegionOps macio_alias_ops = {
     },
 };
 
+static uint64_t machine_id_read(void *opaque, hwaddr addr, unsigned size)
+{
+    return Q800_MACHINE_ID;
+}
+
+static void machine_id_write(void *opaque, hwaddr addr, uint64_t val,
+                             unsigned size)
+{
+    return;
+}
+
+static const MemoryRegionOps machine_id_ops = {
+    .read = machine_id_read,
+    .write = machine_id_write,
+    .endianness = DEVICE_BIG_ENDIAN,
+    .valid = {
+        .min_access_size = 4,
+        .max_access_size = 4,
+    },
+};
+
 static void q800_machine_init(MachineState *machine)
 {
     Q800MachineState *m = Q800_MACHINE(machine);
@@ -253,6 +277,11 @@ static void q800_machine_init(MachineState *machine)
     memory_region_add_subregion(get_system_memory(), IO_BASE + IO_SLICE,
                                 &m->macio_alias);
 
+    memory_region_init_io(&m->machine_id, NULL, &machine_id_ops, NULL,
+                          "Machine ID", 4);
+    memory_region_add_subregion(get_system_memory(), 0x5ffffffc,
+                                &m->machine_id);
+
     /* IRQ Glue */
     object_initialize_child(OBJECT(machine), "glue", &m->glue, TYPE_GLUE);
     object_property_set_link(OBJECT(&m->glue), "cpu", OBJECT(&m->cpu),
diff --git a/include/hw/m68k/q800.h b/include/hw/m68k/q800.h
index f6ae4c1c4f..dd7d7a6f2c 100644
--- a/include/hw/m68k/q800.h
+++ b/include/hw/m68k/q800.h
@@ -60,6 +60,7 @@ struct Q800MachineState {
     DJMEMCState djmemc;
     MemoryRegion macio;
     MemoryRegion macio_alias;
+    MemoryRegion machine_id;
 };
 
 #define TYPE_Q800_MACHINE MACHINE_TYPE_NAME("q800")