diff --git a/reactos/ntoskrnl/ex/win32k.c b/reactos/ntoskrnl/ex/win32k.c
index cf552ceff4a..00e972017a4 100644
--- a/reactos/ntoskrnl/ex/win32k.c
+++ b/reactos/ntoskrnl/ex/win32k.c
@@ -31,6 +31,27 @@
 
 /* DATA **********************************************************************/
 
+#define WINSTA_ACCESSCLIPBOARD	(0x4L)
+#define WINSTA_ACCESSGLOBALATOMS	(0x20L)
+#define WINSTA_CREATEDESKTOP	(0x8L)
+#define WINSTA_ENUMDESKTOPS	(0x1L)
+#define WINSTA_ENUMERATE	(0x100L)
+#define WINSTA_EXITWINDOWS	(0x40L)
+#define WINSTA_READATTRIBUTES	(0x2L)
+#define WINSTA_READSCREEN	(0x200L)
+#define WINSTA_WRITEATTRIBUTES	(0x10L)
+
+#define DF_ALLOWOTHERACCOUNTHOOK	(0x1L)
+#define DESKTOP_CREATEMENU	(0x4L)
+#define DESKTOP_CREATEWINDOW	(0x2L)
+#define DESKTOP_ENUMERATE	(0x40L)
+#define DESKTOP_HOOKCONTROL	(0x8L)
+#define DESKTOP_JOURNALPLAYBACK	(0x20L)
+#define DESKTOP_JOURNALRECORD	(0x10L)
+#define DESKTOP_READOBJECTS	(0x1L)
+#define DESKTOP_SWITCHDESKTOP	(0x100L)
+#define DESKTOP_WRITEOBJECTS	(0x80L)
+
 POBJECT_TYPE EXPORTED ExWindowStationObjectType = NULL;
 POBJECT_TYPE EXPORTED ExDesktopObjectType = NULL;