diff --git a/sys/conf/majors b/sys/conf/majors
index 67c8062e93b8..7d177e37038a 100644
--- a/sys/conf/majors
+++ b/sys/conf/majors
@@ -20,7 +20,6 @@
 # 
 #maj 	name		comments
 1	*ctty		/dev/tty
-2	*mm		/dev/mem,kmem,etc
 4	*geom		GEOMetry
 5	*pts		pseudo tty "tty" half
 6	*ptc		pseudo tty "master" half
diff --git a/sys/kern/subr_bus.c b/sys/kern/subr_bus.c
index 19568f0504a2..15312ca7c3dc 100644
--- a/sys/kern/subr_bus.c
+++ b/sys/kern/subr_bus.c
@@ -348,7 +348,6 @@ static d_read_t		devread;
 static d_ioctl_t	devioctl;
 static d_poll_t		devpoll;
 
-#define CDEV_MAJOR 173
 static struct cdevsw dev_cdevsw = {
 	.d_version =	D_VERSION,
 	.d_flags =	D_NEEDGIANT,
@@ -358,7 +357,6 @@ static struct cdevsw dev_cdevsw = {
 	.d_ioctl =	devioctl,
 	.d_poll =	devpoll,
 	.d_name =	"devctl",
-	.d_maj =	CDEV_MAJOR,
 };
 
 struct dev_event_info