diff --git a/xCAT-server/lib/perl/xCAT/Postage.pm b/xCAT-server/lib/perl/xCAT/Postage.pm
index 9564ccad4..9eed072d0 100644
--- a/xCAT-server/lib/perl/xCAT/Postage.pm
+++ b/xCAT-server/lib/perl/xCAT/Postage.pm
@@ -277,8 +277,8 @@ sub makescript
     # !!!!!  it must be an unencrypted value for AIX!!!!
     # - user will have to reset if this is a security issue
     $os =~ s/\s*$//;
-    $os =~ tr/A-Z/a-z/;    # Convert to lowercase
-    if ($os eq "aix")
+    #$os =~ tr/A-Z/a-z/;    # Convert to lowercase
+    if ($os eq "aix" || $os eq "AIX")
     {
         my $passwdtab = xCAT::Table->new('passwd');
         unless ($passwdtab)
@@ -473,6 +473,7 @@ sub makescript
                 elsif ($os =~ /ubuntu.*/) { $platform = "ubuntu"; }
                 elsif ($os =~ /debian.*/) { $platform = "debian"; }
                 elsif ($os =~ /aix.*/)    { $platform = "aix"; }
+                elsif ($os =~ /AIX.*/)    { $platform = "AIX"; }
             }
             if (($nodesetstate) && ($nodesetstate eq "netboot"))
             {