diff --git a/configs/T1040RDB_defconfig b/configs/T1040RDB_defconfig
index 71ecc81..aa4f5ea 100644
--- a/configs/T1040RDB_defconfig
+++ b/configs/T1040RDB_defconfig
@@ -2,3 +2,4 @@
 CONFIG_MPC85xx=y
 CONFIG_TARGET_T104XRDB=y
 CONFIG_SYS_EXTRA_OPTIONS="PPC_T1040,T1040RDB"
+CONFIG_CMD_SETEXPR=y