diff --git a/reactos/subsys/win32k/include/msgqueue.h b/reactos/subsys/win32k/include/msgqueue.h
index 1f59059a380..7c084ca8f22 100644
--- a/reactos/subsys/win32k/include/msgqueue.h
+++ b/reactos/subsys/win32k/include/msgqueue.h
@@ -62,6 +62,13 @@ typedef struct _USER_MESSAGE_QUEUE
   HWND ActiveWindow;
   /* Current capture window for this queue. */
   HWND CaptureWindow;
+
+  /* queue state tracking */
+  WORD WakeBits;
+  WORD WakeMask;
+  WORD ChangedBits;
+  WORD ChangedMask;
+
 } USER_MESSAGE_QUEUE, *PUSER_MESSAGE_QUEUE;
 
 VOID FASTCALL
@@ -123,6 +130,10 @@ MsqPostKeyboardMessage(UINT uMsg, WPARAM wParam, LPARAM lParam);
 VOID FASTCALL
 MsqInsertSystemMessage(MSG* Msg);
 
+inline BOOL MsqIsSignaled( PUSER_MESSAGE_QUEUE queue );
+inline VOID MsqSetQueueBits( PUSER_MESSAGE_QUEUE queue, WORD bits );
+inline VOID MsqClearQueueBits( PUSER_MESSAGE_QUEUE queue, WORD bits );
+
 #define MAKE_LONG(x, y) ((((y) & 0xFFFF) << 16) | ((x) & 0xFFFF))
 
 #endif /* __WIN32K_MSGQUEUE_H */