diff --git a/arch/arm/configs/mxs_defconfig b/arch/arm/configs/mxs_defconfig
index 7bf5351..7bf9aba 100644
--- a/arch/arm/configs/mxs_defconfig
+++ b/arch/arm/configs/mxs_defconfig
@@ -29,6 +29,7 @@ CONFIG_HIGH_RES_TIMERS=y
 CONFIG_PREEMPT_VOLUNTARY=y
 CONFIG_AEABI=y
 CONFIG_AUTO_ZRELADDR=y
+CONFIG_CPU_IDLE=y
 CONFIG_FPE_NWFPE=y
 CONFIG_NET=y
 CONFIG_PACKET=y