diff --git a/mobile.netbiblio.php b/mobile.netbiblio.php
index 150b8d9..1d93ee8 100644
--- a/mobile.netbiblio.php
+++ b/mobile.netbiblio.php
@@ -316,14 +316,14 @@ class NetBiblio extends WebService
         $bs = new BookSearch();
 
         if (isset($queryArray['queryType'])) {
-            $bs->addSortField('author_s', SolrQuery::ORDER_ASC);
-            $bs->addSortField('title_s', SolrQuery::ORDER_ASC);
+            $bs->addSortField('author', SolrQuery::ORDER_ASC);
+            $bs->addSortField('title', SolrQuery::ORDER_ASC);
             $bs->addSortField('producer');
             $bs->addSortField('mediatype', SolrQuery::ORDER_ASC);
         } else {
             $bs->addSortField('availabilitydate');
-            $bs->addSortField('author_s', SolrQuery::ORDER_ASC);
-            $bs->addSortField('title_s', SolrQuery::ORDER_ASC);
+            $bs->addSortField('author', SolrQuery::ORDER_ASC);
+            $bs->addSortField('title', SolrQuery::ORDER_ASC);
         }
 
         if (isset($queryArray['queryText']) && strlen($queryArray['queryText']) > 0) {