diff --git a/trackbert.py b/trackbert.py
index 4f0b490..94f3521 100644
--- a/trackbert.py
+++ b/trackbert.py
@@ -232,7 +232,11 @@ def start_loop(db: sqlite3.Connection, api: KeyDelivery) -> Never:
 
             events = sorted(all_events["data"]["items"], key=lambda x: x["time"], reverse=True)
 
-            logging.debug(f"Latest known event for {tracking_number}: {latest_known_event[3]} - {latest_known_event[2]}")
+            if latest_known_event:
+                logging.debug(f"Latest known event for {tracking_number}: {latest_known_event[3]} - {latest_known_event[2]}")
+            else:
+                logging.debug(f"No known events for {tracking_number}")
+
             logging.debug(f"Latest upstream event for {tracking_number}: {events[0]['context']} - {events[0]['time']}")
 
             latest = True