diff --git a/xCAT-client/pods/man1/reventlog.1.pod b/xCAT-client/pods/man1/reventlog.1.pod
index 3fd9c7e78..fb1a03387 100644
--- a/xCAT-client/pods/man1/reventlog.1.pod
+++ b/xCAT-client/pods/man1/reventlog.1.pod
@@ -4,7 +4,7 @@ B<reventlog> - retrieve or clear remote hardware event logs
 
 =head1 B<Synopsis>
 
-B<reventlog> I<noderange> {I<number-of-entries>|B<all>|B<clear>}
+B<reventlog> I<noderange> {I<number-of-entries [-s]>|B<all [-s]>|B<clear>}
 
 B<reventlog> [B<-h>|B<--help>|B<-v>|B<--version>]
 
@@ -26,6 +26,10 @@ Retrieve the specified number of entries from the nodes' service processors.
 
 Retrieve all entries.
 
+=item B<-s>
+
+To sort the entries from latest (always the last entry in event DB) to oldest (always the first entry in event DB). If B<number-of-entries> specified, the latest B<number-of-entries> events will be output in the order of latest to oldest.
+
 =item B<clear>
 
 Clear event logs.