diff --git a/etc/etc.arm/ttys b/etc/etc.arm/ttys
index b6fd9edc7486..ba410b707c1c 100644
--- a/etc/etc.arm/ttys
+++ b/etc/etc.arm/ttys
@@ -41,7 +41,7 @@ ttyv7	"/usr/libexec/getty Pc"		xterm	off  secure
 #ttyv8	"/usr/local/bin/xdm -nodaemon"	xterm	off secure
 # Serial terminals
 # The 'dialup' keyword identifies dialin lines to login, fingerd etc.
-ttyu0	"/usr/libexec/getty std.9600"	vt100	on  secure
+ttyu0	"/usr/libexec/getty 3wire"	vt100	on  secure
 ttyu1	"/usr/libexec/getty std.9600"	dialup	off secure
 ttyu2	"/usr/libexec/getty std.9600"	dialup	off secure
 ttyu3	"/usr/libexec/getty std.9600"	dialup	off secure
diff --git a/etc/etc.ia64/ttys b/etc/etc.ia64/ttys
index 2cc8effbe726..6ddc77759cac 100644
--- a/etc/etc.ia64/ttys
+++ b/etc/etc.ia64/ttys
@@ -41,8 +41,8 @@ ttyv7	"/usr/libexec/getty Pc"		xterm	off secure
 ttyv8	"/usr/local/bin/xdm -nodaemon"	xterm	off secure
 # Serial terminals. The 'dialup' keyword identifies dialin lines to login,
 # fingerd etc.
-ttyu0	"/usr/libexec/getty std.9600"	vt100	on  secure
-ttyu1	"/usr/libexec/getty std.9600"	vt100	on  secure
+ttyu0	"/usr/libexec/getty 3wire"	vt100	on  secure
+ttyu1	"/usr/libexec/getty 3wire"	vt100	on  secure
 ttyu2	"/usr/libexec/getty std.9600"	dialup	off secure
 ttyu3	"/usr/libexec/getty std.9600"	dialup	off secure
 # Dumb console
diff --git a/etc/etc.mips/ttys b/etc/etc.mips/ttys
index 2fbeae5282f1..a07cbc282cdb 100644
--- a/etc/etc.mips/ttys
+++ b/etc/etc.mips/ttys
@@ -30,7 +30,7 @@
 console	none				unknown	off secure
 # Serial terminals
 # The 'dialup' keyword identifies dialin lines to login, fingerd etc.
-ttyu0	"/usr/libexec/getty std.115200"	dialup	on  secure
+ttyu0	"/usr/libexec/getty 3wire"	vt100	on  secure
 ttyu1	"/usr/libexec/getty std.115200"	dialup	off secure
 ttyu2	"/usr/libexec/getty std.115200"	dialup	off secure
 ttyu3	"/usr/libexec/getty std.115200"	dialup	off secure
diff --git a/etc/etc.powerpc/ttys b/etc/etc.powerpc/ttys
index 51a802c113d8..793a155b6358 100644
--- a/etc/etc.powerpc/ttys
+++ b/etc/etc.powerpc/ttys
@@ -41,7 +41,7 @@ ttyv7	"/usr/libexec/getty Pc"		xterm	on  secure
 #ttyv8	"/usr/local/bin/xdm -nodaemon"	xterm	off secure
 # Serial terminals
 # The 'dialup' keyword identifies dialin lines to login, fingerd etc.
-ttyu0	"/usr/libexec/getty std.9600"	vt100	on  secure
+ttyu0	"/usr/libexec/getty 3wire"	vt100	on  secure
 ttyu1	"/usr/libexec/getty std.9600"	dialup	off secure
 ttyu2	"/usr/libexec/getty std.9600"	dialup	off secure
 ttyu3	"/usr/libexec/getty std.9600"	dialup	off secure
diff --git a/etc/etc.sparc64/ttys b/etc/etc.sparc64/ttys
index fccc6bde3c89..c3fa95f9ad57 100644
--- a/etc/etc.sparc64/ttys
+++ b/etc/etc.sparc64/ttys
@@ -46,9 +46,9 @@ ttyv8	"/usr/local/bin/xdm -nodaemon"	xterm	off secure
 # Serial terminals
 # The 'dialup' keyword identifies dialin lines to login, fingerd etc.
 # uart(4)
-ttyu0	"/usr/libexec/getty std.9600"	vt100	on  secure
-ttyu1	"/usr/libexec/getty std.9600"	vt100	on  secure
-ttyu2	"/usr/libexec/getty std.9600"	vt100	on  secure
+ttyu0	"/usr/libexec/getty 3wire"	vt100	on  secure
+ttyu1	"/usr/libexec/getty 3wire"	vt100	on  secure
+ttyu2	"/usr/libexec/getty 3wire"	vt100	on  secure
 ttyu3	"/usr/libexec/getty std.9600"	vt100	off secure
 # Dumb console
 dcons	"/usr/libexec/getty std.9600"	vt100	off secure