diff --git a/reactos/base/applications/taskmgr/precomp.h b/reactos/base/applications/taskmgr/precomp.h
index 8c1fd797319..e066d2ce929 100644
--- a/reactos/base/applications/taskmgr/precomp.h
+++ b/reactos/base/applications/taskmgr/precomp.h
@@ -13,7 +13,6 @@
 #define WIN32_NO_STATUS
 #include <windows.h>
 #define NTOS_MODE_USER
-#include <ndk/extypes.h>
 #include <ndk/exfuncs.h>
 #include <aclapi.h>
 #include <commctrl.h>
diff --git a/reactos/base/shell/cmd/precomp.h b/reactos/base/shell/cmd/precomp.h
index 2c7a0fbb854..c442b98c302 100644
--- a/reactos/base/shell/cmd/precomp.h
+++ b/reactos/base/shell/cmd/precomp.h
@@ -26,7 +26,6 @@
 #include <assert.h>
 
 #define NTOS_MODE_USER
-#include <ndk/pstypes.h>
 #include <ndk/rtlfuncs.h>
 
 #include "resource.h"
diff --git a/reactos/base/system/autochk/autochk.c b/reactos/base/system/autochk/autochk.c
index 971c14ad16d..101edbb8ff1 100644
--- a/reactos/base/system/autochk/autochk.c
+++ b/reactos/base/system/autochk/autochk.c
@@ -15,9 +15,7 @@
 #define NTOS_MODE_USER
 #include <ndk/exfuncs.h>
 #include <ndk/iofuncs.h>
-#include <ndk/obtypes.h>
 #include <ndk/obfuncs.h>
-#include <ndk/pstypes.h>
 #include <ndk/psfuncs.h>
 #include <ndk/rtlfuncs.h>
 #include <ndk/umfuncs.h>