diff --git a/src/idle.c b/src/idle.c
index 50d55657a1df757b49d258bf2f48a5ac684d1642..b821c66fd978bf786ae8f3ef21c5b0af9de989d4 100644
--- a/src/idle.c
+++ b/src/idle.c
@@ -185,7 +185,7 @@ static void rt_thread_idle_entry(void *parameter)
 {
     while (1)
     {
-    #if defined(RT_USING_IDLE_HOOK) && (RT_USING_IDLE_HOOK == 1)
+    #ifdef RT_USING_IDLE_HOOK
         if (rt_thread_idle_hook != RT_NULL)
         {
             rt_thread_idle_hook();