diff --git a/xtoskrnl/includes/ar.h b/xtoskrnl/includes/ar.h
deleted file mode 100644
index c079ef0..0000000
--- a/xtoskrnl/includes/ar.h
+++ /dev/null
@@ -1,15 +0,0 @@
-/**
- * PROJECT:         ExectOS
- * COPYRIGHT:       See COPYING.md in the top level directory
- * FILE:            xtoskrnl/includes/ar.h
- * DESCRIPTION:     Private routine definitions for architecture library
- * DEVELOPERS:      Rafal Kupiec <belliash@codingworkshop.eu.org>
- */
-
-#ifndef __XTOSKRNL_AR_H
-#define __XTOSKRNL_AR_H
-
-#include <xtos.h>
-
-
-#endif /* __XTOSKRNL_AR_H */
diff --git a/xtoskrnl/includes/xtos.h b/xtoskrnl/includes/xtos.h
index 1e864ac..20f7e31 100644
--- a/xtoskrnl/includes/xtos.h
+++ b/xtoskrnl/includes/xtos.h
@@ -14,7 +14,6 @@
 
 /* Kernel specific headers */
 #include "globals.h"
-#include "ar.h"
 #include "hl.h"
 #include "ke.h"
 #include "po.h"