diff --git a/admin/batch_manager_global.php b/admin/batch_manager_global.php
index 688bb5c49..fce6087f5 100644
--- a/admin/batch_manager_global.php
+++ b/admin/batch_manager_global.php
@@ -651,10 +651,15 @@ if (count($page['cat_elements_id']) > 0)
     $is_category = true;
   }
 
+  // If using the 'duplicates' filter,
+  // order by the fields that are used to find duplicates.
   if (isset($_SESSION['bulk_manager_filter']['prefilter'])
-      and 'duplicates' == $_SESSION['bulk_manager_filter']['prefilter'])
+      and 'duplicates' === $_SESSION['bulk_manager_filter']['prefilter']
+      and isset($duplicates_on_fields))
   {
-    $conf['order_by'] = ' ORDER BY file, id';
+    // The $duplicates_on_fields variable is defined in ./batch_manager.php
+    $order_by_fields = array_merge( $duplicates_on_fields, array( 'id' ) );
+    $conf['order_by'] = ' ORDER BY '.join(', ', $order_by_fields);
   }
 
   $query = '