diff --git a/arch/arm/configs/lager_defconfig b/arch/arm/configs/lager_defconfig
index ee93b8a55cf9d45e14d790016cbd24df67c1517a..3e7e0aef26c9a8d13874d9b08b565a87155d0f08 100644
--- a/arch/arm/configs/lager_defconfig
+++ b/arch/arm/configs/lager_defconfig
@@ -49,6 +49,8 @@ CONFIG_IP_PNP_DHCP=y
 # CONFIG_IPV6 is not set
 # CONFIG_WIRELESS is not set
 CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
 CONFIG_BLK_DEV_SD=y
 CONFIG_ATA=y
 CONFIG_SATA_RCAR=y