diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index fe6b11d..e77ed88 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -1418,13 +1418,9 @@ static void virt_2_6_instance_init(Object *obj)
 static void virt_2_6_class_init(ObjectClass *oc, void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
-    static GlobalProperty compat_props[] = {
-        { /* end of list */ }
-    };
 
     mc->desc = "QEMU 2.6 ARM Virtual Machine";
     mc->alias = "virt";
-    mc->compat_props = compat_props;
 }
 
 static const TypeInfo machvirt_info = {
diff --git a/hw/core/machine.c b/hw/core/machine.c
index 0bb96ad..ccdd5fa 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -571,6 +571,15 @@ bool machine_mem_merge(MachineState *machine)
     return machine->mem_merge;
 }
 
+static void machine_class_finalize(ObjectClass *klass, void *data)
+{
+    MachineClass *mc = MACHINE_CLASS(klass);
+
+    if (mc->compat_props) {
+        g_array_free(mc->compat_props, true);
+    }
+}
+
 static const TypeInfo machine_info = {
     .name = TYPE_MACHINE,
     .parent = TYPE_OBJECT,
@@ -578,6 +587,7 @@ static const TypeInfo machine_info = {
     .class_size = sizeof(MachineClass),
     .class_init    = machine_class_init,
     .class_base_init = machine_class_base_init,
+    .class_finalize = machine_class_finalize,
     .instance_size = sizeof(MachineState),
     .instance_init = machine_initfn,
     .instance_finalize = machine_finalize,
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 7f50116..32918bb 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -582,7 +582,6 @@ DEFINE_I440FX_MACHINE(v1_4, "pc-i440fx-1.4", pc_compat_1_4,
 
 
 #define PC_COMPAT_1_3 \
-        PC_COMPAT_1_4 \
         {\
             .driver   = "usb-tablet",\
             .property = "usb_version",\
@@ -614,7 +613,6 @@ DEFINE_I440FX_MACHINE(v1_3, "pc-1.3", pc_compat_1_3,
 
 
 #define PC_COMPAT_1_2 \
-        PC_COMPAT_1_3 \
         {\
             .driver   = "nec-usb-xhci",\
             .property = "msi",\
@@ -653,7 +651,6 @@ DEFINE_I440FX_MACHINE(v1_2, "pc-1.2", pc_compat_1_2,
 
 
 #define PC_COMPAT_1_1 \
-        PC_COMPAT_1_2 \
         {\
             .driver   = "virtio-scsi-pci",\
             .property = "hotplug",\
@@ -696,7 +693,6 @@ DEFINE_I440FX_MACHINE(v1_1, "pc-1.1", pc_compat_1_2,
 
 
 #define PC_COMPAT_1_0 \
-        PC_COMPAT_1_1 \
         {\
             .driver   = TYPE_ISA_FDC,\
             .property = "check_media_rate",\
@@ -726,14 +722,10 @@ DEFINE_I440FX_MACHINE(v1_0, "pc-1.0", pc_compat_1_2,
                       pc_i440fx_1_0_machine_options);
 
 
-#define PC_COMPAT_0_15 \
-        PC_COMPAT_1_0
-
 static void pc_i440fx_0_15_machine_options(MachineClass *m)
 {
     pc_i440fx_1_0_machine_options(m);
     m->hw_version = "0.15";
-    SET_MACHINE_COMPAT(m, PC_COMPAT_0_15);
 }
 
 DEFINE_I440FX_MACHINE(v0_15, "pc-0.15", pc_compat_1_2,
@@ -741,7 +733,6 @@ DEFINE_I440FX_MACHINE(v0_15, "pc-0.15", pc_compat_1_2,
 
 
 #define PC_COMPAT_0_14 \
-        PC_COMPAT_0_15 \
         {\
             .driver   = "virtio-blk-pci",\
             .property = "event_idx",\
@@ -780,7 +771,6 @@ DEFINE_I440FX_MACHINE(v0_14, "pc-0.14", pc_compat_1_2,
 
 
 #define PC_COMPAT_0_13 \
-        PC_COMPAT_0_14 \
         {\
             .driver   = TYPE_PCI_DEVICE,\
             .property = "command_serr_enable",\
@@ -817,7 +807,6 @@ DEFINE_I440FX_MACHINE(v0_13, "pc-0.13", pc_compat_0_13,
 
 
 #define PC_COMPAT_0_12 \
-        PC_COMPAT_0_13 \
         {\
             .driver   = "virtio-serial-pci",\
             .property = "max_ports",\
@@ -852,7 +841,6 @@ DEFINE_I440FX_MACHINE(v0_12, "pc-0.12", pc_compat_0_13,
 
 
 #define PC_COMPAT_0_11 \
-        PC_COMPAT_0_12 \
         {\
             .driver   = "virtio-blk-pci",\
             .property = "vectors",\
@@ -883,7 +871,6 @@ DEFINE_I440FX_MACHINE(v0_11, "pc-0.11", pc_compat_0_13,
 
 
 #define PC_COMPAT_0_10 \
-    PC_COMPAT_0_11 \
     {\
         .driver   = "virtio-blk-pci",\
         .property = "class",\
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index de1de1d..add68ac 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -2387,7 +2387,6 @@ DEFINE_SPAPR_MACHINE(2_5, "2.5", false);
  * pseries-2.4
  */
 #define SPAPR_COMPAT_2_4 \
-        SPAPR_COMPAT_2_5 \
         HW_COMPAT_2_4
 
 static void spapr_machine_2_4_instance_options(MachineState *machine)
@@ -2410,7 +2409,6 @@ DEFINE_SPAPR_MACHINE(2_4, "2.4", false);
  * pseries-2.3
  */
 #define SPAPR_COMPAT_2_3 \
-        SPAPR_COMPAT_2_4 \
         HW_COMPAT_2_3 \
         {\
             .driver   = "spapr-pci-host-bridge",\
@@ -2438,7 +2436,6 @@ DEFINE_SPAPR_MACHINE(2_3, "2.3", false);
  */
 
 #define SPAPR_COMPAT_2_2 \
-        SPAPR_COMPAT_2_3 \
         HW_COMPAT_2_2 \
         {\
             .driver   = TYPE_SPAPR_PCI_HOST_BRIDGE,\
@@ -2463,7 +2460,6 @@ DEFINE_SPAPR_MACHINE(2_2, "2.2", false);
  * pseries-2.1
  */
 #define SPAPR_COMPAT_2_1 \
-        SPAPR_COMPAT_2_2 \
         HW_COMPAT_2_1
 
 static void spapr_machine_2_1_instance_options(MachineState *machine)
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index 18bbbfb..95ff5e3 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -330,7 +330,6 @@ static const TypeInfo ccw_machine_info = {
         HW_COMPAT_2_5
 
 #define CCW_COMPAT_2_4 \
-        CCW_COMPAT_2_5 \
         HW_COMPAT_2_4 \
         {\
             .driver   = TYPE_S390_SKEYS,\
diff --git a/include/hw/boards.h b/include/hw/boards.h
index f968a25..d268bd0 100644
--- a/include/hw/boards.h
+++ b/include/hw/boards.h
@@ -114,7 +114,7 @@ struct MachineClass {
     const char *default_machine_opts;
     const char *default_boot_order;
     const char *default_display;
-    GlobalProperty *compat_props;
+    GArray *compat_props;
     const char *hw_version;
     ram_addr_t default_ram_size;
     bool option_rom_has_mr;
@@ -186,11 +186,18 @@ struct MachineState {
 
 #define SET_MACHINE_COMPAT(m, COMPAT) \
     do {                              \
+        int i;                        \
         static GlobalProperty props[] = {       \
             COMPAT                              \
             { /* end of list */ }               \
         };                                      \
-        (m)->compat_props = props;              \
+        if (!m->compat_props) { \
+            m->compat_props = g_array_new(false, false, sizeof(void *)); \
+        } \
+        for (i = 0; props[i].driver != NULL; i++) {    \
+            GlobalProperty *prop = &props[i];          \
+            g_array_append_val(m->compat_props, prop); \
+        }                                              \
     } while (0)
 
 #endif
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index 96f0b66..367b6db 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -360,7 +360,6 @@ bool e820_get_entry(int, uint32_t, uint64_t *, uint64_t *);
     HW_COMPAT_2_5
 
 #define PC_COMPAT_2_4 \
-    PC_COMPAT_2_5 \
     HW_COMPAT_2_4 \
     {\
         .driver   = "Haswell-" TYPE_X86_CPU,\
@@ -431,7 +430,6 @@ bool e820_get_entry(int, uint32_t, uint64_t *, uint64_t *);
 
 
 #define PC_COMPAT_2_3 \
-    PC_COMPAT_2_4 \
     HW_COMPAT_2_3 \
     {\
         .driver   = TYPE_X86_CPU,\
@@ -512,7 +510,6 @@ bool e820_get_entry(int, uint32_t, uint64_t *, uint64_t *);
     },
 
 #define PC_COMPAT_2_2 \
-    PC_COMPAT_2_3 \
     HW_COMPAT_2_2 \
     {\
         .driver = "kvm64" "-" TYPE_X86_CPU,\
@@ -606,7 +603,6 @@ bool e820_get_entry(int, uint32_t, uint64_t *, uint64_t *);
     },
 
 #define PC_COMPAT_2_1 \
-    PC_COMPAT_2_2 \
     HW_COMPAT_2_1 \
     {\
         .driver = "coreduo" "-" TYPE_X86_CPU,\
@@ -620,7 +616,6 @@ bool e820_get_entry(int, uint32_t, uint64_t *, uint64_t *);
     },
 
 #define PC_COMPAT_2_0 \
-    PC_COMPAT_2_1 \
     {\
         .driver   = "virtio-scsi-pci",\
         .property = "any_layout",\
@@ -680,7 +675,6 @@ bool e820_get_entry(int, uint32_t, uint64_t *, uint64_t *);
     },
 
 #define PC_COMPAT_1_7 \
-    PC_COMPAT_2_0 \
     {\
         .driver   = TYPE_USB_DEVICE,\
         .property = "msos-desc",\
@@ -698,7 +692,6 @@ bool e820_get_entry(int, uint32_t, uint64_t *, uint64_t *);
     },
 
 #define PC_COMPAT_1_6 \
-    PC_COMPAT_1_7 \
     {\
         .driver   = "e1000",\
         .property = "mitigation",\
@@ -722,7 +715,6 @@ bool e820_get_entry(int, uint32_t, uint64_t *, uint64_t *);
     },
 
 #define PC_COMPAT_1_5 \
-    PC_COMPAT_1_6 \
     {\
         .driver   = "Conroe-" TYPE_X86_CPU,\
         .property = "model",\
@@ -766,7 +758,6 @@ bool e820_get_entry(int, uint32_t, uint64_t *, uint64_t *);
     },
 
 #define PC_COMPAT_1_4 \
-    PC_COMPAT_1_5 \
     {\
         .driver   = "scsi-hd",\
         .property = "discard_granularity",\
diff --git a/vl.c b/vl.c
index 8861862..0228843 100644
--- a/vl.c
+++ b/vl.c
@@ -4473,7 +4473,11 @@ int main(int argc, char **argv, char **envp)
     }
 
     if (machine_class->compat_props) {
-        qdev_prop_register_global_list(machine_class->compat_props);
+        GlobalProperty *p;
+        for (i = 0; i < machine_class->compat_props->len; i++) {
+            p = g_array_index(machine_class->compat_props, GlobalProperty *, i);
+            qdev_prop_register_global(p);
+        }
     }
     qemu_add_globals();
 
