diff --git a/target/linux/ar71xx/files/drivers/net/ag71xx/Kconfig b/target/linux/ar71xx/files/drivers/net/ag71xx/Kconfig
index 56a59648cf..801fcaf9d7 100644
--- a/target/linux/ar71xx/files/drivers/net/ag71xx/Kconfig
+++ b/target/linux/ar71xx/files/drivers/net/ag71xx/Kconfig
@@ -17,7 +17,7 @@ config AG71XX_AR8216_SUPPORT
 	bool "special support for the Atheros AR8216 switch"
 	depends on AG71XX
 	default n
-	default y if AR71XX_MACH_WNR2000 || AR71XX_MACH_MZK_W04NU
+	default y if AR71XX_MACH_WNR2000 || AR71XX_MACH_MZK_W04NU || AR71XX_MACH_WRT400N
 	help
 	  Say 'y' here if you want to enable special support for the
 	  Atheros AR8216 switch found on some boards.