diff --git a/sohstationviewer/model/reftek_data/reftek.py b/sohstationviewer/model/reftek_data/reftek.py
index 67333865f8185bb253b98c8bbb85c0951a3ce6ce..2981f017851a4fdbdaebafcf6bce32eab3d2ebeb 100755
--- a/sohstationviewer/model/reftek_data/reftek.py
+++ b/sohstationviewer/model/reftek_data/reftek.py
@@ -29,7 +29,7 @@ from sohstationviewer.model.reftek_data.reftek_reader import core, soh_packet
 from sohstationviewer.model.reftek_data.log_info import LogInfo
 
 
-def format_timestamp_as_mass_pos_time (timestamp: float) -> str:
+def format_timestamp_as_mass_pos_time(timestamp: float) -> str:
     """
     Format a UTC timestamp in the format of a mass-position time in SOH
     messages.