diff --git a/meta-aspeed/conf/machine/include/aspeed.inc b/meta-aspeed/conf/machine/include/aspeed.inc
index 384ff48..4bed9e3 100644
--- a/meta-aspeed/conf/machine/include/aspeed.inc
+++ b/meta-aspeed/conf/machine/include/aspeed.inc
@@ -15,3 +15,5 @@
 INITRAMFS_FSTYPES ?= "cpio.xz"
 
 MACHINEOVERRIDES =. "aspeed:"
+
+SERIAL_CONSOLES ?= "115200;ttyS4"
diff --git a/meta-aspeed/conf/machine/include/ast2400.inc b/meta-aspeed/conf/machine/include/ast2400.inc
index a7c900a..547a3c0 100644
--- a/meta-aspeed/conf/machine/include/ast2400.inc
+++ b/meta-aspeed/conf/machine/include/ast2400.inc
@@ -12,5 +12,3 @@
 UBOOT_LOADADDRESS ?= "0x40001000"
 
 MACHINE_EXTRA_RDEPENDS += "udev-aspeed-vuart"
-
-SERIAL_CONSOLES = "115200;ttyS4"
diff --git a/meta-aspeed/conf/machine/include/ast2500.inc b/meta-aspeed/conf/machine/include/ast2500.inc
index 49a6211..34039b4 100644
--- a/meta-aspeed/conf/machine/include/ast2500.inc
+++ b/meta-aspeed/conf/machine/include/ast2500.inc
@@ -14,5 +14,3 @@
 UBOOT_LOADADDRESS ?= "0x80001000"
 
 MACHINE_EXTRA_RDEPENDS += "udev-aspeed-vuart"
-
-SERIAL_CONSOLES = "115200;ttyS4"