diff --git a/include/hw/xen/xen.h b/include/hw/xen/xen.h
index 9d549fc..85fda3d 100644
--- a/include/hw/xen/xen.h
+++ b/include/hw/xen/xen.h
@@ -36,7 +36,7 @@ void xen_cmos_set_s3_resume(void *opaque, int irq, int level);
 
 qemu_irq *xen_interrupt_controller_init(void);
 
-int xen_init(QEMUMachine *machine);
+int xen_init(MachineClass *mc);
 int xen_hvm_init(MemoryRegion **ram_memory);
 void xenstore_store_pv_console_info(int i, struct CharDriverState *chr);
 
diff --git a/include/qemu/typedefs.h b/include/qemu/typedefs.h
index bf8daac..86bab12 100644
--- a/include/qemu/typedefs.h
+++ b/include/qemu/typedefs.h
@@ -31,6 +31,7 @@ typedef struct MemoryListener MemoryListener;
 typedef struct MemoryMappingList MemoryMappingList;
 
 typedef struct QEMUMachine QEMUMachine;
+typedef struct MachineClass MachineClass;
 typedef struct NICInfo NICInfo;
 typedef struct HCIInfo HCIInfo;
 typedef struct AudioState AudioState;
diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
index 0bee1e8..518655c 100644
--- a/include/sysemu/kvm.h
+++ b/include/sysemu/kvm.h
@@ -152,7 +152,7 @@ extern KVMState *kvm_state;
 
 /* external API */
 
-int kvm_init(QEMUMachine *machine);
+int kvm_init(MachineClass *mc);
 
 int kvm_has_sync_mmu(void);
 int kvm_has_vcpu_events(void);
diff --git a/include/sysemu/qtest.h b/include/sysemu/qtest.h
index 224131f..95c9ade 100644
--- a/include/sysemu/qtest.h
+++ b/include/sysemu/qtest.h
@@ -26,7 +26,7 @@ static inline bool qtest_enabled(void)
 
 bool qtest_driver(void);
 
-int qtest_init_accel(QEMUMachine *machine);
+int qtest_init_accel(MachineClass *mc);
 void qtest_init(const char *qtest_chrdev, const char *qtest_log, Error **errp);
 
 static inline int qtest_available(void)
diff --git a/kvm-all.c b/kvm-all.c
index cd4111d..1bb979d 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -1341,7 +1341,7 @@ static int kvm_max_vcpus(KVMState *s)
     return (ret) ? ret : kvm_recommended_vcpus(s);
 }
 
-int kvm_init(QEMUMachine *machine)
+int kvm_init(MachineClass *mc)
 {
     static const char upgrade_note[] =
         "Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n"
@@ -1433,8 +1433,8 @@ int kvm_init(QEMUMachine *machine)
     }
 
     kvm_type = qemu_opt_get(qemu_get_machine_opts(), "kvm-type");
-    if (machine->kvm_type) {
-        type = machine->kvm_type(kvm_type);
+    if (mc->kvm_type) {
+        type = mc->kvm_type(kvm_type);
     } else if (kvm_type) {
         fprintf(stderr, "Invalid argument kvm-type=%s\n", kvm_type);
         goto err;
diff --git a/kvm-stub.c b/kvm-stub.c
index ccdba62..8acda86 100644
--- a/kvm-stub.c
+++ b/kvm-stub.c
@@ -34,7 +34,7 @@ int kvm_init_vcpu(CPUState *cpu)
     return -ENOSYS;
 }
 
-int kvm_init(QEMUMachine *machine)
+int kvm_init(MachineClass *mc)
 {
     return -ENOSYS;
 }
diff --git a/qtest.c b/qtest.c
index 0ac9f42..2aba20d 100644
--- a/qtest.c
+++ b/qtest.c
@@ -500,7 +500,7 @@ static void qtest_event(void *opaque, int event)
     }
 }
 
-int qtest_init_accel(QEMUMachine *machine)
+int qtest_init_accel(MachineClass *mc)
 {
     configure_icount("0");
 
diff --git a/vl.c b/vl.c
index dc8d515..5119937 100644
--- a/vl.c
+++ b/vl.c
@@ -2720,7 +2720,7 @@ static MachineClass *machine_parse(const char *name)
     exit(!name || !is_help_option(name));
 }
 
-static int tcg_init(QEMUMachine *machine)
+static int tcg_init(MachineClass *mc)
 {
     tcg_exec_init(tcg_tb_size * 1024 * 1024);
     return 0;
@@ -2730,7 +2730,7 @@ static struct {
     const char *opt_name;
     const char *name;
     int (*available)(void);
-    int (*init)(QEMUMachine *);
+    int (*init)(MachineClass *mc);
     bool *allowed;
 } accel_list[] = {
     { "tcg", "tcg", tcg_available, tcg_init, &tcg_allowed },
@@ -2739,7 +2739,7 @@ static struct {
     { "qtest", "QTest", qtest_available, qtest_init_accel, &qtest_allowed },
 };
 
-static int configure_accelerator(QEMUMachine *machine)
+static int configure_accelerator(MachineClass *mc)
 {
     const char *p;
     char buf[10];
@@ -2766,7 +2766,7 @@ static int configure_accelerator(QEMUMachine *machine)
                     continue;
                 }
                 *(accel_list[i].allowed) = true;
-                ret = accel_list[i].init(machine);
+                ret = accel_list[i].init(mc);
                 if (ret < 0) {
                     init_failed = true;
                     fprintf(stderr, "failed to initialize %s: %s\n",
@@ -4187,7 +4187,7 @@ int main(int argc, char **argv, char **envp)
         exit(0);
     }
 
-    configure_accelerator(machine);
+    configure_accelerator(machine_class);
 
     if (qtest_chrdev) {
         Error *local_err = NULL;
diff --git a/xen-all.c b/xen-all.c
index ba34739..a63b531 100644
--- a/xen-all.c
+++ b/xen-all.c
@@ -1001,7 +1001,7 @@ static void xen_exit_notifier(Notifier *n, void *data)
     xs_daemon_close(state->xenstore);
 }
 
-int xen_init(QEMUMachine *machine)
+int xen_init(MachineClass *mc)
 {
     xen_xc = xen_xc_interface_open(0, 0, 0);
     if (xen_xc == XC_HANDLER_INITIAL_VALUE) {
diff --git a/xen-stub.c b/xen-stub.c
index 59927cb..de26583 100644
--- a/xen-stub.c
+++ b/xen-stub.c
@@ -47,7 +47,7 @@ qemu_irq *xen_interrupt_controller_init(void)
     return NULL;
 }
 
-int xen_init(QEMUMachine *machine)
+int xen_init(MachineClass *mc)
 {
     return -ENOSYS;
 }
