log_null(struct udev *udev, const char *format, ...) {}
#ifdef USE_LOG
-# ifdef USE_DEBUG
+# ifdef DEBUG
# define dbg(udev, arg...) udev_log(udev, LOG_DEBUG, __FILE__, __LINE__, __FUNCTION__, ## arg)
# else
# define dbg(udev, arg...) log_null(udev, ## arg)