diff --git a/fs/skeleton/etc/securetty b/fs/skeleton/etc/securetty
index 547ceda573..c96f2fb9f3 100644
--- a/fs/skeleton/etc/securetty
+++ b/fs/skeleton/etc/securetty
@@ -46,4 +46,6 @@ ttySC2
 ttySC3
 ttySC4
 ttySC5
+ttySC6
+ttySC7
 ttyGS0
diff --git a/target/generic/device_table_dev.txt b/target/generic/device_table_dev.txt
index a3d53d460a..d1d1e110c5 100644
--- a/target/generic/device_table_dev.txt
+++ b/target/generic/device_table_dev.txt
@@ -32,7 +32,7 @@
 /dev/ttyCPM	c	666	0	0	204	46	0	1	4
 /dev/ttyAMA	c	666	0	0	204	64	0	1	4
 /dev/ttySAC	c	666	0	0	204	64	0	1	4
-/dev/ttySC	c	666	0	0	204	8	0	1	6
+/dev/ttySC	c	666	0	0	204	8	0	1	8
 /dev/ttyPSC	c	666	0	0	204	148	0	1	4
 /dev/ttyUL	c	666	0	0	204	187	0	1	4
 /dev/ttymxc	c	666	0	0	207	16	0	1	3