diff --git a/xCAT-server/lib/xcat/plugins/AAsn.pm b/xCAT-server/lib/xcat/plugins/AAsn.pm
index 511b81853..11744ca52 100755
--- a/xCAT-server/lib/xcat/plugins/AAsn.pm
+++ b/xCAT-server/lib/xcat/plugins/AAsn.pm
@@ -2,6 +2,12 @@
 # IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html
 #-------------------------------------------------------
 package xCAT_plugin::AAsn;
+
+BEGIN
+{
+    $::XCATROOT = $ENV{'XCATROOT'} ? $ENV{'XCATROOT'} : '/opt/xcat';
+}
+use lib "$::XCATROOT/lib/perl";
 use strict;
 use xCAT::Table;