diff --git a/perl-xCAT/xCAT/NetworkUtils.pm b/perl-xCAT/xCAT/NetworkUtils.pm
index 2a115b26d..f3c92e13a 100755
--- a/perl-xCAT/xCAT/NetworkUtils.pm
+++ b/perl-xCAT/xCAT/NetworkUtils.pm
@@ -1023,7 +1023,7 @@ sub my_nets
       my $n = $_->{net};
       my $if = $_->{mgtifname};
       my $nm = $_->{mask};
-      if (!$n || !$if || $nm)
+      if (!$n || !$if || !$nm)
       {
           next; #incomplete network
       }