diff --git a/mobile.netbiblio.php b/mobile.netbiblio.php
index 08e0f48..27e79d6 100644
--- a/mobile.netbiblio.php
+++ b/mobile.netbiblio.php
@@ -231,11 +231,7 @@ class NetBiblio extends WebService
 
         $uri = sprintf("%s%s",
             Configuration::get('checkfile_url'),
-            http_build_query(array(
-                "client" => $this->client,
-                "login" => $this->login,
-                "book" => implode(',', $ids),
-            ))
+            http_build_query(array("book" => implode(',', $ids)))
         );
 
         $ch = curl_init($uri);