diff --git a/arch/arm/configs/spacecast_defconfig b/arch/arm/configs/spacecast_defconfig
index 07779bc..ee339ef 100644
--- a/arch/arm/configs/spacecast_defconfig
+++ b/arch/arm/configs/spacecast_defconfig
@@ -16,6 +16,7 @@
 CONFIG_DEFAULT_ENVIRONMENT_PATH="arch/arm/boards/optimus/env_spacecast"
 CONFIG_ANTIREBOOTLOOP=y
 CONFIG_CMD_EDIT=y
+CONFIG_CMD_MSLEEP=y
 CONFIG_CMD_SAVEENV=y
 CONFIG_CMD_LOADENV=y
 CONFIG_CMD_EXPORT=y