diff --git a/src/Kconfig b/src/Kconfig
index 79205e0a5a..78a3bf6d67 100644
--- a/src/Kconfig
+++ b/src/Kconfig
@@ -51,14 +51,14 @@ config RT_USING_OVERFLOW_CHECK
 config RT_USING_HOOK
     bool "Enable system hook"
     default y
-	select RT_USING_IDLE_HOOK
+    select RT_USING_IDLE_HOOK
     help
         Enable the hook function when system running, such as idle thread hook,
         thread context switch etc.
 
 config RT_USING_IDLE_HOOK
-	bool "Enable IDLE Task hook"
-	default y if RT_USING_HOOK
+    bool "Enable IDLE Task hook"
+    default y if RT_USING_HOOK
 
     if RT_USING_IDLE_HOOK
     config RT_IDEL_HOOK_LIST_SIZE