diff --git a/sdk/lib/drivers/arbiter/CMakeLists.txt b/sdk/lib/drivers/arbiter/CMakeLists.txt
index 2bf4e36025f..a049c8c8b38 100644
--- a/sdk/lib/drivers/arbiter/CMakeLists.txt
+++ b/sdk/lib/drivers/arbiter/CMakeLists.txt
@@ -1,10 +1,8 @@
 
-include_directories(${REACTOS_SOURCE_DIR}/sdk/lib/rtl)
+add_definitions(-D_NTSYSTEM_)
 
 list(APPEND SOURCE
-    arbiter.c
-    arbiter.h)
+    arbiter.c)
 
 add_library(arbiter ${SOURCE})
 add_dependencies(arbiter bugcodes xdk)
-add_pch(arbiter arbiter.h SOURCE)
diff --git a/sdk/lib/drivers/arbiter/arbiter.c b/sdk/lib/drivers/arbiter/arbiter.c
index fc85159b69b..9d7d5561de4 100644
--- a/sdk/lib/drivers/arbiter/arbiter.c
+++ b/sdk/lib/drivers/arbiter/arbiter.c
@@ -8,11 +8,14 @@
 
 /* INCLUDES *******************************************************************/
 
-#define NDEBUG
-#include <debug.h>
+#include <ntifs.h>
+#include <ndk/rtltypes.h>
 
 #include "arbiter.h"
 
+#define NDEBUG
+#include <debug.h>
+
 /* GLOBALS ********************************************************************/
 
 /* DATA **********************************************************************/
diff --git a/sdk/lib/drivers/arbiter/arbiter.h b/sdk/lib/drivers/arbiter/arbiter.h
index c4a51623e52..6b8be2fb207 100644
--- a/sdk/lib/drivers/arbiter/arbiter.h
+++ b/sdk/lib/drivers/arbiter/arbiter.h
@@ -9,11 +9,6 @@
 #ifndef _ARBITER_H
 #define _ARBITER_H
 
-#ifndef _NTOSKRNL_
-#include <ntifs.h>
-#include <ndk/rtlfuncs.h>
-#endif
-
 typedef struct _ARBITER_ORDERING
 {
     ULONGLONG Start;