diff --git a/configs/T4240RDB_defconfig b/configs/T4240RDB_defconfig
index 52cb41f..bbaab35 100644
--- a/configs/T4240RDB_defconfig
+++ b/configs/T4240RDB_defconfig
@@ -3,6 +3,10 @@
 CONFIG_ENV_SIZE=0x2000
 CONFIG_ENV_SECT_SIZE=0x20000
 CONFIG_DEFAULT_DEVICE_TREE="t4240rdb"
+CONFIG_VID=y
+CONFIG_VID_FLS_ENV="t4240rdb_vdd_mv"
+CONFIG_VOL_MONITOR_IR36021_READ=y
+CONFIG_VOL_MONITOR_IR36021_SET=y
 CONFIG_MPC85xx=y
 CONFIG_TARGET_T4240RDB=y
 CONFIG_MPC85XX_HAVE_RESET_VECTOR=y