diff --git a/pclzip_zip_node_files.module b/pclzip_zip_node_files.module
index 3fd803f..b68d8d2 100755
--- a/pclzip_zip_node_files.module
+++ b/pclzip_zip_node_files.module
@@ -256,7 +256,8 @@ function pclzip_zip_node_files_get_node_files($node) {
   foreach ($available_fields as $field) {
     $nodefields = field_get_items('node', $node, $field, $node->language);
     foreach ($nodefields as $file) {
-      $nodefiles[] = drupal_realpath($file['uri']);
+      if(isset($file['uri']))
+        $nodefiles[] = drupal_realpath($file['uri']);
     }
   }