diff --git a/superxas_bec/devices/timepix/timepix.py b/superxas_bec/devices/timepix/timepix.py
index ff2b4cc..1a91545 100644
--- a/superxas_bec/devices/timepix/timepix.py
+++ b/superxas_bec/devices/timepix/timepix.py
@@ -665,7 +665,7 @@ if __name__ == "__main__":  # pragma: no cover
                 if n_messages > 0:
                     msg = timepix._msg_dump[-1]
                     logger.warning(
-                        f"Last message had N start_frame : {len(msg.get('start_frame'))},  N data_frames: {len(msg.get('data_frame'))}, N end_frame : {len(msg.get('end_frame'))}"
+                        f"Last message had N start_frame : {msg.get('start_frame')},  N data_frames: {len(msg.get('data_frame'))}, N end_frame : {msg.get('end_frame')}"
                     )
             status = timepix.complete()
             print("Waiting for timepix to complete.")