diff --git a/xCAT-client/pods/man1/updatenode.1.pod b/xCAT-client/pods/man1/updatenode.1.pod
index 13cbf28fe..d8a2d1d1d 100644
--- a/xCAT-client/pods/man1/updatenode.1.pod
+++ b/xCAT-client/pods/man1/updatenode.1.pod
@@ -4,7 +4,7 @@ B<updatenode> - Update nodes in an xCAT cluster environment.
 
 =head1 SYNOPSIS
 
-B<updatenode> B<noderange> [B<-V>|B<--verbose>] [B<-F>|B<--sync>] [B<-f>|B<--snsync>] [B<-S>|B<--sw>]  [B<-l>  I<userID>]  [B<-P>|B<--scripts> [B<script1,script2...>]] [B<-s>|B<--sn>] [B<-A>|B<--updateallsw>] [B<-c>|B<--cmdlineonly>] [B<-d alt_source_dir>] [B<attr=val> [B<attr=val...>]]
+B<updatenode> B<noderange> [B<-V>|B<--verbose>] [B<-F>|B<--sync>] [B<-f>|B<--snsync>] [B<-S>|B<--sw>]  [B<-l>  I<userID>]  [B<-P>|B<--scripts> [B<script1,script2...>]] [B<-s>|B<--sn>] [B<-A>|B<--updateallsw>] [B<-c>|B<--cmdlineonly>] [B<-d alt_source_dir>] [B<--fanout>]  [B<attr=val> [B<attr=val...>]]
 
 B<updatenode> B<noderange> [B<-k>|B<--security>]
 
@@ -278,6 +278,13 @@ maintenance support.
 
 =over 10
 
+=item B<--fanout>=I<fanout_value>
+
+Specifies a fanout value for the maximum number of  concur-
+rently  executing  remote shell processes. Serial execution
+can be specified by indicating a fanout value of B<1>.  If  B<--fanout>
+is not specified, a default fanout value of B<64> is used.
+
 =item B<-A|--updateallsw>
 
 Install or update all software contained in the source directory. (AIX only)