diff --git a/config/kernel/linux-sunxi-current.config b/config/kernel/linux-sunxi-current.config
index d2dadd03a..b001e11dc 100644
--- a/config/kernel/linux-sunxi-current.config
+++ b/config/kernel/linux-sunxi-current.config
@@ -2874,7 +2874,8 @@ CONFIG_SERIAL_CONEXANT_DIGICOLOR=m
 # end of Serial drivers
 
 CONFIG_SERIAL_MCTRL_GPIO=y
-CONFIG_SERIAL_DEV_BUS=m
+CONFIG_SERIAL_DEV_BUS=y
+CONFIG_SERIAL_DEV_CTRL_TTYPORT=y
 # CONFIG_TTY_PRINTK is not set
 # CONFIG_PRINTER is not set
 # CONFIG_PPDEV is not set
diff --git a/config/kernel/linux-sunxi-dev.config b/config/kernel/linux-sunxi-dev.config
index c7036261a..4c55af537 100644
--- a/config/kernel/linux-sunxi-dev.config
+++ b/config/kernel/linux-sunxi-dev.config
@@ -2844,7 +2844,8 @@ CONFIG_SERIAL_CONEXANT_DIGICOLOR=m
 # end of Serial drivers
 
 CONFIG_SERIAL_MCTRL_GPIO=y
-CONFIG_SERIAL_DEV_BUS=m
+CONFIG_SERIAL_DEV_BUS=y
+CONFIG_SERIAL_DEV_CTRL_TTYPORT=y
 # CONFIG_TTY_PRINTK is not set
 # CONFIG_PRINTER is not set
 # CONFIG_PPDEV is not set