diff --git a/configs/T1042RDB_SECURE_BOOT_defconfig b/configs/T1042RDB_SECURE_BOOT_defconfig
index 8aee85f..851646f 100644
--- a/configs/T1042RDB_SECURE_BOOT_defconfig
+++ b/configs/T1042RDB_SECURE_BOOT_defconfig
@@ -2,3 +2,4 @@
 CONFIG_MPC85xx=y
 CONFIG_TARGET_T104XRDB=y
 CONFIG_SYS_EXTRA_OPTIONS="PPC_T1042,SECURE_BOOT,T1042RDB"
+CONFIG_CMD_SETEXPR=y