extern struct udev_device *udev_device_new_from_devnum(struct udev *udev, char type, dev_t devnum);
extern struct udev_device *udev_device_new_from_subsystem_sysname(struct udev *udev, const char *subsystem, const char *sysname);
extern struct udev_device *udev_device_get_parent(struct udev_device *udev_device);
-extern struct udev_device *udev_device_get_parent_with_subsytem_devtype(struct udev_device *udev_device, const char *subsystem, const char *devtype);
+extern struct udev_device *udev_device_get_parent_with_subsystem_devtype(struct udev_device *udev_device, const char *subsystem, const char *devtype);
extern struct udev_device *udev_device_ref(struct udev_device *udev_device);
extern void udev_device_unref(struct udev_device *udev_device);
extern struct udev *udev_device_get_udev(struct udev_device *udev_device);