diff --git a/fi/train.go b/fi/train.go
index 6de6dee..843fe31 100644
--- a/fi/train.go
+++ b/fi/train.go
@@ -103,6 +103,7 @@ type TrainHeadPositionInfo struct {
 	OldLink string
 	//列车上一次车头位置信息
 	OldLinkOffset int64
+	IsLine12      bool
 }
 
 func (t *TrainHeadPositionInfo) String() string {