diff --git a/sys/alpha/conf/GENERIC b/sys/alpha/conf/GENERIC
index 069d631ef771..60a1a6f70c20 100644
--- a/sys/alpha/conf/GENERIC
+++ b/sys/alpha/conf/GENERIC
@@ -145,7 +145,7 @@ device		xl		# 3Com 3c90x (``Boomerang'', ``Cyclone'')
 # Pseudo devices - the number indicates how many units to allocated.
 pseudo-device	loop		# Network loopback
 pseudo-device	ether		# Ethernet support
-pseudo-device	sl	1	# Kernel SLIP
+pseudo-device	sl		# Kernel SLIP
 pseudo-device	ppp	1	# Kernel PPP
 pseudo-device	tun		# Packet tunnel.
 pseudo-device	pty		# Pseudo-ttys (telnet etc)
diff --git a/sys/alpha/conf/NOTES b/sys/alpha/conf/NOTES
index 069d631ef771..60a1a6f70c20 100644
--- a/sys/alpha/conf/NOTES
+++ b/sys/alpha/conf/NOTES
@@ -145,7 +145,7 @@ device		xl		# 3Com 3c90x (``Boomerang'', ``Cyclone'')
 # Pseudo devices - the number indicates how many units to allocated.
 pseudo-device	loop		# Network loopback
 pseudo-device	ether		# Ethernet support
-pseudo-device	sl	1	# Kernel SLIP
+pseudo-device	sl		# Kernel SLIP
 pseudo-device	ppp	1	# Kernel PPP
 pseudo-device	tun		# Packet tunnel.
 pseudo-device	pty		# Pseudo-ttys (telnet etc)
diff --git a/sys/alpha/conf/SIMOS b/sys/alpha/conf/SIMOS
index f1b04307f312..1345069b276c 100644
--- a/sys/alpha/conf/SIMOS
+++ b/sys/alpha/conf/SIMOS
@@ -57,7 +57,7 @@ device		cd
 
 pseudo-device	loop
 pseudo-device	ether
-pseudo-device	sl	1
+pseudo-device	sl
 pseudo-device	ppp	1
 pseudo-device	tun
 pseudo-device	pty
diff --git a/sys/amd64/conf/GENERIC b/sys/amd64/conf/GENERIC
index 6c344d975f59..2a538e81b400 100644
--- a/sys/amd64/conf/GENERIC
+++ b/sys/amd64/conf/GENERIC
@@ -205,7 +205,7 @@ device		lnc0	at isa? port 0x280 irq 10 drq 0
 # Pseudo devices - the number indicates how many units to allocated.
 pseudo-device	loop		# Network loopback
 pseudo-device	ether		# Ethernet support
-pseudo-device	sl	1	# Kernel SLIP
+pseudo-device	sl		# Kernel SLIP
 pseudo-device	ppp	1	# Kernel PPP
 pseudo-device	tun		# Packet tunnel.
 pseudo-device	pty		# Pseudo-ttys (telnet etc)
diff --git a/sys/conf/NOTES b/sys/conf/NOTES
index 5596e932b52b..0106f167be00 100644
--- a/sys/conf/NOTES
+++ b/sys/conf/NOTES
@@ -456,7 +456,7 @@ pseudo-device	loop			#Network loopback device
 pseudo-device	bpf			#Berkeley packet filter
 pseudo-device	disc			#Discard device (ds0, ds1, etc)
 pseudo-device	tun			#Tunnel driver (ppp(8), nos-tun(8))
-pseudo-device	sl	2		#Serial Line IP
+pseudo-device	sl			#Serial Line IP
 pseudo-device	ppp	2		#Point-to-point protocol
 options 	PPP_BSDCOMP		#PPP BSD-compress support
 options 	PPP_DEFLATE		#PPP zlib/deflate/gzip support
diff --git a/sys/i386/conf/GENERIC b/sys/i386/conf/GENERIC
index 6c344d975f59..2a538e81b400 100644
--- a/sys/i386/conf/GENERIC
+++ b/sys/i386/conf/GENERIC
@@ -205,7 +205,7 @@ device		lnc0	at isa? port 0x280 irq 10 drq 0
 # Pseudo devices - the number indicates how many units to allocated.
 pseudo-device	loop		# Network loopback
 pseudo-device	ether		# Ethernet support
-pseudo-device	sl	1	# Kernel SLIP
+pseudo-device	sl		# Kernel SLIP
 pseudo-device	ppp	1	# Kernel PPP
 pseudo-device	tun		# Packet tunnel.
 pseudo-device	pty		# Pseudo-ttys (telnet etc)
diff --git a/sys/i386/conf/LINT b/sys/i386/conf/LINT
index 5596e932b52b..0106f167be00 100644
--- a/sys/i386/conf/LINT
+++ b/sys/i386/conf/LINT
@@ -456,7 +456,7 @@ pseudo-device	loop			#Network loopback device
 pseudo-device	bpf			#Berkeley packet filter
 pseudo-device	disc			#Discard device (ds0, ds1, etc)
 pseudo-device	tun			#Tunnel driver (ppp(8), nos-tun(8))
-pseudo-device	sl	2		#Serial Line IP
+pseudo-device	sl			#Serial Line IP
 pseudo-device	ppp	2		#Point-to-point protocol
 options 	PPP_BSDCOMP		#PPP BSD-compress support
 options 	PPP_DEFLATE		#PPP zlib/deflate/gzip support
diff --git a/sys/i386/conf/NEWCARD b/sys/i386/conf/NEWCARD
index 865db07b6b3b..9e95ab3e6c57 100644
--- a/sys/i386/conf/NEWCARD
+++ b/sys/i386/conf/NEWCARD
@@ -212,7 +212,7 @@ device		sn0	at isa? port 0x300 irq 10
 # Pseudo devices - the number indicates how many units to allocated.
 pseudo-device	loop		# Network loopback
 pseudo-device	ether		# Ethernet support
-pseudo-device	sl	1	# Kernel SLIP
+pseudo-device	sl		# Kernel SLIP
 pseudo-device	ppp	1	# Kernel PPP
 pseudo-device	tun		# Packet tunnel.
 pseudo-device	pty		# Pseudo-ttys (telnet etc)
diff --git a/sys/i386/conf/NOTES b/sys/i386/conf/NOTES
index 5596e932b52b..0106f167be00 100644
--- a/sys/i386/conf/NOTES
+++ b/sys/i386/conf/NOTES
@@ -456,7 +456,7 @@ pseudo-device	loop			#Network loopback device
 pseudo-device	bpf			#Berkeley packet filter
 pseudo-device	disc			#Discard device (ds0, ds1, etc)
 pseudo-device	tun			#Tunnel driver (ppp(8), nos-tun(8))
-pseudo-device	sl	2		#Serial Line IP
+pseudo-device	sl			#Serial Line IP
 pseudo-device	ppp	2		#Point-to-point protocol
 options 	PPP_BSDCOMP		#PPP BSD-compress support
 options 	PPP_DEFLATE		#PPP zlib/deflate/gzip support