Index: sites/all/modules/node_convert/node_convert.module
===================================================================
--- sites/all/modules/node_convert/node_convert.module	(revision 145)
+++ sites/all/modules/node_convert/node_convert.module	(working copy)
@@ -34,8 +34,10 @@
  * Implementation of hook_init().
  */
 function node_convert_init() {
-  require_once './'. drupal_get_path('module', 'node_convert') ."/includes/book.node_convert.inc";
-  require_once './'. drupal_get_path('module', 'node_convert') ."/includes/forum.node_convert.inc";
+  $path = drupal_get_path('module', 'node_convert');
+  foreach (array('book', 'panels_node', 'forum') AS $module) {
+    module_load_include('node_convert.inc', 'node_convert', 'includes/' . $module);
+  }
 }
 
 /**
@@ -940,4 +942,4 @@
       node_convert_messages($result, array('nid' => $nid));
     }
   }
-}
\ No newline at end of file
+}