diff --git a/df_datalink_sp/src/networking/link_layer/link_layer.h b/df_datalink_sp/src/networking/link_layer/link_layer.h
index c6f5007..7e57207 100644
--- a/df_datalink_sp/src/networking/link_layer/link_layer.h
+++ b/df_datalink_sp/src/networking/link_layer/link_layer.h
@@ -64,6 +64,8 @@ typedef struct
 	uint32_t svcTxCnt;
 	uint32_t svcRecvCnt;
 	uint32_t svcCorrectCnt;
+
+	int64_t timeDev;
 } L2_LOG;
 
 typedef struct
@@ -166,7 +168,8 @@ L2_FRAME_TYPE L2_GetNextFrameType(L2_INST *instPtr);
 L2_TOR_TYPE L2_GetNextTor(L2_INST *instPtr);
 
 // Time syncronization
-int32_t L2_TimeAlign(L2_INST *instPtr, uint32_t frameNum, uint32_t slotNum, bool relative);
+int32_t L2_GetTimeDeviation(L2_INST *instPtr, uint32_t frameNum, uint32_t slotNum, bool relative, int64_t* timeDev);
+void L2_TimeAdjust(L2_INST *instPtr, const int64_t *timeDev);
 
 
 #endif /* __LINK_LAYER_H_ */