diff --git a/include/migration/vmstate.h b/include/migration/vmstate.h
index 30667631bc..eafa39f560 100644
--- a/include/migration/vmstate.h
+++ b/include/migration/vmstate.h
@@ -1199,7 +1199,6 @@ static inline int vmstate_register(VMStateIf *obj, int instance_id,
 void vmstate_unregister(VMStateIf *obj, const VMStateDescription *vmsd,
                         void *opaque);
 
-struct MemoryRegion;
 void vmstate_register_ram(struct MemoryRegion *memory, DeviceState *dev);
 void vmstate_unregister_ram(struct MemoryRegion *memory, DeviceState *dev);
 void vmstate_register_ram_global(struct MemoryRegion *memory);