diff --git a/protos/stationLayoutGraphics.proto b/protos/stationLayoutGraphics.proto
index 5509476..5e60d1f 100644
--- a/protos/stationLayoutGraphics.proto
+++ b/protos/stationLayoutGraphics.proto
@@ -336,6 +336,7 @@ message Transponder { // 应答器
   KilometerSystem kilometerSystem = 5; //公里标
   RelatedRef TransponderRef = 6;       //关联关系
   repeated string centralizedStations = 7; // 集中站列表
+  string fixedTelegram = 8;//无源应答器固定报文
 }
 
 message SimpleRef {