diff --git a/boards/arm/lc823450/lc823450-xgevk/configs/bt/defconfig b/boards/arm/lc823450/lc823450-xgevk/configs/bt/defconfig
index c9fffa136f4..ba9f203c485 100644
--- a/boards/arm/lc823450/lc823450-xgevk/configs/bt/defconfig
+++ b/boards/arm/lc823450/lc823450-xgevk/configs/bt/defconfig
@@ -93,8 +93,6 @@ CONFIG_NET_ROUTE=y
 CONFIG_NET_STATISTICS=y
 CONFIG_NET_TCP=y
 CONFIG_NET_TCP_KEEPALIVE=y
-CONFIG_NET_TUN=y
-CONFIG_NET_TUN_PKTSIZE=1500
 CONFIG_NET_UDP=y
 CONFIG_NSH_ARCHINIT=y
 CONFIG_NSH_BUILTIN_APPS=y