diff --git a/xCAT-server-2.0/lib/xcat/plugins/nodediscover.pm b/xCAT-server-2.0/lib/xcat/plugins/nodediscover.pm
index 4bfcb643e..4b7162623 100644
--- a/xCAT-server-2.0/lib/xcat/plugins/nodediscover.pm
+++ b/xCAT-server-2.0/lib/xcat/plugins/nodediscover.pm
@@ -32,7 +32,7 @@ sub gethosttag {
    my $netn = shift;
    my $ifname = shift;
    my $usednames = shift;
-   my %netmap = %{xCAT::Utils::my_if_netmap};
+   my %netmap = %{xCAT::Utils::my_if_netmap()};
    my $mgtifname = $netmap{$netn};
    my $secondpass = 0;
    my $name = "";