diff --git a/internal/datacoord/segment_info.go b/internal/datacoord/segment_info.go
index 0fa9bdc339..f24150ccf1 100644
--- a/internal/datacoord/segment_info.go
+++ b/internal/datacoord/segment_info.go
@@ -253,6 +253,7 @@ func SetBinlogs(binlogs []*datapb.FieldBinlog) SegmentInfoOption {
 	}
 }
 
+// SetFlushTime is the option to set flush time for segment info
 func SetFlushTime(t time.Time) SegmentInfoOption {
 	return func(segment *SegmentInfo) {
 		segment.lastFlushTime = t