diff --git a/msg/timesync.msg b/msg/timesync.msg
index 45c92f27e7..67f415c744 100644
--- a/msg/timesync.msg
+++ b/msg/timesync.msg
@@ -1,5 +1,4 @@
 uint64 timestamp	       # time since system start (microseconds)
-uint8 sys_id                  # id of the origin system
 uint8 seq		       # timesync msg sequence
 int64 tc1		       # time sync timestamp 1
 int64 ts1		       # time sync timestamp 2