diff --git a/protos/stationLayoutGraphics.proto b/protos/stationLayoutGraphics.proto
index 3a2b773..5695ffd 100644
--- a/protos/stationLayoutGraphics.proto
+++ b/protos/stationLayoutGraphics.proto
@@ -400,6 +400,7 @@ message GatedBox {
   string code = 2;
   bool flip = 3;   // 是否翻转（前端显示）
   int32 index = 4; //索引
+  string refScreenDoor = 5; // 关联屏蔽门
 }
 
 /** 坡度公里标 */