diff --git a/datalink814_ge/src/linklayer/linklayer814.h b/datalink814_ge/src/linklayer/linklayer814.h
index 7b0015d..9d59231 100644
--- a/datalink814_ge/src/linklayer/linklayer814.h
+++ b/datalink814_ge/src/linklayer/linklayer814.h
@@ -69,6 +69,7 @@ typedef struct {
 	L2_RCD frameNum; // stores the last current and next frame number.
 	L2_RCD slotNum;  // stores the last current and next slot number.
 	L2_RCD frame;   // stores the last current and next link layer frame type.
+	L2_RCD tor;   // stores the last current and next link layer tx/rx state.
 	L2_NODE_STATE mainState; // the main state of link layer state
 	L2_NODE_STATE nextState; // next state of link layer state, which will be applied to mainState every second.
 	L2_RTNE_CONFIG rtneConfig; // current routine table configuration and status.