diff -u b/pathauto.module b/pathauto.module
--- b/pathauto.module
+++ b/pathauto.module
@@ -459,7 +459,7 @@
   // it doesn't collide with same language or language neutral aliases.
   $query = db_select('url_alias', 'ua')
          ->fields('ua', array('pid'))
-         ->condition('source', $source)
+         ->condition('source', $source, '<>')
          ->condition('alias', $alias);
 
   if ($langcode != LANGUAGE_NONE) {