diff --git a/modules/taxonomy/taxonomy.module b/modules/taxonomy/taxonomy.module
index ba483bb..e19c9ab 100644
--- a/modules/taxonomy/taxonomy.module
+++ b/modules/taxonomy/taxonomy.module
@@ -1049,9 +1049,9 @@ function taxonomy_get_tree($vid, $parent = 0, $max_depth = NULL, $load_entities
  * Provides a case-insensitive and trimmed mapping, to maximize the
  * likelihood of a successful match.
  *
- * @param name
+ * @param $name
  *   Name of the term to search for.
- * @param vocabulary
+ * @param $vocabulary
  *   (optional) Vocabulary machine name to limit the search.
  *
  * @return
@@ -1059,7 +1059,7 @@ function taxonomy_get_tree($vid, $parent = 0, $max_depth = NULL, $load_entities
  */
 function taxonomy_get_term_by_name($name, $vocabulary = NULL) {
   $conditions = array('name' => trim($name));
-  if ($vocabulary) {
+  if (isset($vocabulary)) {
     $vocabularies = taxonomy_vocabulary_get_names();
     $conditions['vid'] = $vocabularies[$vocabulary]->vid;
   }