diff --git a/master/sites/all/modules/contrib/node_revision_delete/node_revision_delete.batch.inc b/master/sites/all/modules/contrib/node_revision_delete/node_revision_delete.batch.inc
index 229a95d..6d7a777 100644
--- a/master/sites/all/modules/contrib/node_revision_delete/node_revision_delete.batch.inc
+++ b/master/sites/all/modules/contrib/node_revision_delete/node_revision_delete.batch.inc
@@ -33,8 +33,9 @@ function node_revision_delete_batch_process($content_type, $minimum_revisions_to
 
   // Perform the actual revision deletion.
   $nid = $context['sandbox']['nids'][$context['sandbox']['current']];
-  $deleted_revisions = _node_revision_delete_do_delete($nid, $minimum_revisions_to_keep, $dry_run);
-
+  if (isset($nid)) {
+    $deleted_revisions = _node_revision_delete_do_delete($nid, $minimum_revisions_to_keep, $dry_run);
+  }
   // Save results for final report.
   if (isset($context['results'][$nid])) {
     $context['results'][$nid] += $deleted_revisions->count;