diff --git a/perl-xCAT-2.0/xCAT/Usage.pm b/perl-xCAT-2.0/xCAT/Usage.pm
index f676e722c..b10034920 100644
--- a/perl-xCAT-2.0/xCAT/Usage.pm
+++ b/perl-xCAT-2.0/xCAT/Usage.pm
@@ -83,7 +83,7 @@ my %usage = (
        getmacs <noderange> [-V|--verbose]
        getmacs [-h|--help|-v|--version]
    PPC specific:
-       getmacs <noderange> [-c][-w][-S server -G gateway -C client]",
+       getmacs <noderange> [-c][-d][-S server -G gateway -C client]",
     "mkvm" => 
 "Usage: mkvm singlenode -i id -n name [-V|--verbose]
        mkvm src_fsp -c dest_fsp [-V|--verbose]