diff --git a/includes/export.inc b/includes/export.inc
index 2e4ac4c..b8aaa0d 100644
--- a/includes/export.inc
+++ b/includes/export.inc
@@ -172,7 +172,7 @@ function _menu_import_export_recurse($tree, $level, &$output) {
       if (!empty($details['description'])) {
         unset($link['options']['attributes']['title']);
       }
-      if (empty($link['options']['attributes'])) {
+      if (isset($link['options']['attributes']) && empty($link['options']['attributes'])) {
          unset($link['options']['attributes']);
       }
       if (!empty($link['options'])) {