diff --git a/perl-xCAT/xCAT/Usage.pm b/perl-xCAT/xCAT/Usage.pm
index b72107fd8..9379b0632 100644
--- a/perl-xCAT/xCAT/Usage.pm
+++ b/perl-xCAT/xCAT/Usage.pm
@@ -20,8 +20,11 @@ my %usage = (
 "Usage: rnetboot <noderange> [-f][-V|--verbose]
        rnetboot [-h|--help|-v|--version]",
     "rpower" => 
-"Usage: rpower <noderange> [--nodeps][on|off|reset|stat|state|boot|of|cycle] [-V|--verbose]
-       rpower [-h|--help|-v|--version]",
+"Usage: rpower <noderange> [--nodeps][on|off|reset|stat|state|boot|cycle] [-V|--verbose]
+       rpower [-h|--help|-v|--version]
+     PPC (with IVM or HMC) specific:
+       rpower <noderange> [--nodeps] [of] [-V|--verbose]
+",
     "rbeacon" => 
 "Usage: rbeacon <noderange> [on|off|stat] [-V|--verbose]
        rbeacon [-h|--help|-v|--version]",
diff --git a/xCAT-client/pods/man1/rpower.1.pod b/xCAT-client/pods/man1/rpower.1.pod
index da81d94a0..25121bc69 100644
--- a/xCAT-client/pods/man1/rpower.1.pod
+++ b/xCAT-client/pods/man1/rpower.1.pod
@@ -8,6 +8,10 @@ B<rpower> I<noderange> [B<--nodeps>] {B<on>|B<off>|B<stat>|B<state>|B<reset>|B<b
 
 B<rpower> [B<-h>|B<--help>|B<-v>|B<--version>]
 
+=head2 PPC (with IVM or HMC) specific:
+
+B<rpower> I<noderange> [B<--nodeps>] {B<of>}
+
 =head1 DESCRIPTION
 
 B<rpower> controls the power for a single or range of nodes,  via the out-of-band path.
@@ -42,6 +46,10 @@ This option is recommended over B<cycle>.
 
 Power off, then on.
 
+=item B<of>
+
+Boot the node to open firmware mode.
+
 =item B<--nodeps>
 
 Do not use dependency table (default is to use dependency table). Valid only with on|off|boot|reset|cycle for blade power method.