diff --git a/xCAT-server/lib/xcat/plugins/mknb.pm b/xCAT-server/lib/xcat/plugins/mknb.pm
index e8d8aeb85..435cede47 100644
--- a/xCAT-server/lib/xcat/plugins/mknb.pm
+++ b/xCAT-server/lib/xcat/plugins/mknb.pm
@@ -328,7 +328,7 @@ sub process_request {
                 open($cfg, ">", "$tftpdir/xcat/xnba/nets/$net.uefi");
                 print $cfg "#!gpxe\n";
                 print $cfg 'imgfetch -n kernel http://${next-server}:'.$httpport.'/tftpboot/xcat/genesis.kernel.' . "$arch\nimgload kernel\n";
-                print $cfg "imgargs kernel quiet xcatd=" . $normnets->{$_} . ":$xcatdport $consolecmdline BOOTIF=01-" . '${netX/machyp}' . " destiny=discover initrd=initrd\n";
+                print $cfg "imgargs kernel quiet xcatd=" . $normnets->{$_} . ":$xcatdport $consolecmdline BOOTIF=01-" . '${netX/mac:hexhyp}' . " destiny=discover initrd=initrd\n";
                 print $cfg 'imgfetch -n initrd http://${next-server}:'.$httpport.'/tftpboot/xcat/genesis.fs.' . "$arch.gz\nimgexec kernel\n";
                 close($cfg);
             }