diff --git a/xCAT-server/lib/perl/xCAT/Template.pm b/xCAT-server/lib/perl/xCAT/Template.pm
index fbe04eaba..5396aa31a 100644
--- a/xCAT-server/lib/perl/xCAT/Template.pm
+++ b/xCAT-server/lib/perl/xCAT/Template.pm
@@ -158,6 +158,9 @@ sub subvars {
         # append preseed directive lines
         while (<PKGLISTFILE>) {
           chomp $_;
+          if (/^\s*#.*/ ){
+            next;
+          }
           $pkglist .= " " . $_;
         }