diff --git a/reactos/include/reactos/win32k/ntuser.h b/reactos/include/reactos/win32k/ntuser.h
index f5013e1160b..3f307cc3471 100644
--- a/reactos/include/reactos/win32k/ntuser.h
+++ b/reactos/include/reactos/win32k/ntuser.h
@@ -315,9 +315,6 @@ typedef struct _W32THREADINFO
     ULONG_PTR DesktopHeapDelta;
     /* A mask of what hooks are currently active */
     ULONG Hooks;
-    /* Application compatibility flags */
-    DWORD AppCompatFlags;
-    DWORD AppCompatFlags2;
     CLIENTTHREADINFO ClientThreadInfo;
 } W32THREADINFO, *PW32THREADINFO;