diff --git a/arch/arm/src/imxrt/imxrt_idle.c b/arch/arm/src/imxrt/imxrt_idle.c
index 5f3b76c9e03..2e7e4378bb8 100644
--- a/arch/arm/src/imxrt/imxrt_idle.c
+++ b/arch/arm/src/imxrt/imxrt_idle.c
@@ -177,7 +177,7 @@ void up_idle(void)
 
   up_idlepm();
 
-#if 0 /* REVISIT */
+#if 1
   /* Sleep until an interrupt occurs to save power. */
 
   BEGIN_IDLE();