diff --git a/reactos/include/ntos/zwtypes.h b/reactos/include/ntos/zwtypes.h
index 067ed8bb132..37ba0b14f6a 100755
--- a/reactos/include/ntos/zwtypes.h
+++ b/reactos/include/ntos/zwtypes.h
@@ -1742,7 +1742,7 @@ typedef enum
     LPC_DEBUG_EVENT        = 0x8,
     LPC_ERROR_EVENT        = 0x9,
     LPC_CONNECTION_REQUEST = 0xa,
-    LPC_CONNECTION_REFUSED = 0xb
+    LPC_CONNECTION_REFUSED = 0xb /* ReactOS only */
 
 } LPC_TYPE, *PLPC_TYPE;