diff --git a/modules/bibtexParse/biblio_bibtex.module b/modules/bibtexParse/biblio_bibtex.module
index d102c7a..b66d764 100644
--- a/modules/bibtexParse/biblio_bibtex.module
+++ b/modules/bibtexParse/biblio_bibtex.module
@@ -216,6 +216,8 @@ function _biblio_bibtex_import($entries, $terms = array(), $batch = FALSE, $sess
       case 'phdthesis':
         $node->biblio_type_of_work = 'phd';
         break;
+      default:
+        $node->biblio_type_of_work = '';
     }
     if (!empty($entry['author'])) {
       // split on ' and '