diff --git a/configs/km_kirkwood_defconfig b/configs/km_kirkwood_defconfig
index b7ac8ae..d202fe0 100644
--- a/configs/km_kirkwood_defconfig
+++ b/configs/km_kirkwood_defconfig
@@ -2,3 +2,4 @@
 CONFIG_KIRKWOOD=y
 CONFIG_TARGET_KM_KIRKWOOD=y
 CONFIG_SYS_EXTRA_OPTIONS="KM_KIRKWOOD"
+CONFIG_CMD_SETEXPR=y