diff --git a/Classes/Lib/Dbis.php b/Classes/Lib/Dbis.php
index 6254c14..e1ee636 100755
--- a/Classes/Lib/Dbis.php
+++ b/Classes/Lib/Dbis.php
@@ -782,13 +782,6 @@ private function setRequest($url, $params = [])
         $request->setUrl($url);
         $request->setQuery(['bib_id' => $this->bibID, 'xmloutput' => 1 ]);
 
-        //set empty valus as NULL for Guzzle
-        //foreach ($params as $key => $value) {
-        //    if (empty($value)) {
-        //        $params[$key] = null;
-        //    }
-        //}
-
         if (!empty($params)) {
             $request->setQuery($params);
         }
diff --git a/Classes/Lib/Ezb.php b/Classes/Lib/Ezb.php
index 09f9b47..0fc0ead 100755
--- a/Classes/Lib/Ezb.php
+++ b/Classes/Lib/Ezb.php
@@ -837,13 +837,6 @@ private function setRequest($url, $params = [])
         $request->setUrl($url);
         $request->setQuery(['bibid' => $this->bibID, 'xmloutput' => 1 ]);
 
-        //set empty valus as NULL for Guzzle
-        //foreach ($params as $key => $value) {
-        //    if (empty($value)) {
-        //        $params[$key] = null;
-        //    }
-        //}
-
         if (!empty($params)) {
             $request->setQuery($params);
         }