diff --git a/datalink814_ge/src/linklayer/linklayer814_types.h b/datalink814_ge/src/linklayer/linklayer814_types.h
index 17a60a2..e35562e 100644
--- a/datalink814_ge/src/linklayer/linklayer814_types.h
+++ b/datalink814_ge/src/linklayer/linklayer814_types.h
@@ -93,6 +93,7 @@ typedef enum {
 typedef struct {
 	uint8_t nodeId;
 	uint8_t clustId;
+	uint8_t headId;
 	L2_NODE_TYPE nodeType;
 	uint8_t beamNo;
 	COORD pos;