diff --git a/Ccs/ccs_function_lib.py b/Ccs/ccs_function_lib.py
index d672af4ce3f8ff0ae88fe18c00e6880644e616a3..dc8eec0342a888b08f037ce7407131dcab69eae0 100644
--- a/Ccs/ccs_function_lib.py
+++ b/Ccs/ccs_function_lib.py
@@ -1336,7 +1336,7 @@ def cuc_time_str(head, logger=logger):
             if head.TIMESYNC in tsync_flag:
                 return '{:.6f}{}'.format(head.CTIME + head.FTIME / timepack[2], tsync_flag[head.TIMESYNC])
             else:
-                logger.warning('Unknown timesync flag value {} in packet {}'.format(head.TIMESYNC, head.raw[:4].hex()))
+                logger.warning('Unknown timesync flag value {} in packet {}'.format(head.TIMESYNC, head.PKT_SEQ_CNT))
                 return '{:.6f}{}'.format(head.CTIME + head.FTIME / timepack[2], 'U')
         else:
             return ''