diff --git a/src/timesync.cpp b/src/timesync.cpp
index be752fac..e51454eb 100644
--- a/src/timesync.cpp
+++ b/src/timesync.cpp
@@ -26,7 +26,7 @@ typedef std::chrono::duration<long long int, std::ratio<1, 1000>>
 
 TaskHandle_t timeSyncReqTask = NULL;
 
-static uint8_t time_sync_seqNo = 0;
+static uint8_t time_sync_seqNo = -1;
 static bool timeSyncPending = false;
 static myClock_timepoint time_sync_tx[TIME_SYNC_SAMPLES];
 static myClock_timepoint time_sync_rx[TIME_SYNC_SAMPLES];