diff --git a/xCAT-server/lib/xcat/plugins/mknb.pm b/xCAT-server/lib/xcat/plugins/mknb.pm
index 62e088991..913c96c10 100644
--- a/xCAT-server/lib/xcat/plugins/mknb.pm
+++ b/xCAT-server/lib/xcat/plugins/mknb.pm
@@ -106,11 +106,15 @@ sub process_request {
       mkpath("$tftpdir/pxelinux.cfg");
       chmod(0755,"$tftpdir/pxelinux.cfg");
       if (! -r "$tftpdir/pxelinux.0") {
-         unless (-r "/usr/lib/syslinux/pxelinux.0") {
+         unless (-r "/usr/lib/syslinux/pxelinux.0" or -r "/usr/share/syslinux/pxelinux.0") {
             $callback->({error=>["Unable to find pxelinux.0 "],errorcode=>[1]});
             return;
          }
-         copy("/usr/lib/syslinux/pxelinux.0","$tftpdir/pxelinux.0");
+         if (-r "/usr/lib/syslinux/pxelinux.0") {
+            copy("/usr/lib/syslinux/pxelinux.0","$tftpdir/pxelinux.0");
+         } else {
+            copy("/usr/share/syslinux/pxelinux.0","$tftpdir/pxelinux.0");
+         }
          chmod(0644,"$tftpdir/pxelinux.0");
       }
    }