diff --git a/lib/Alchemy/Phrasea/SearchEngine/Elastic/Thesaurus/Helper.php b/lib/Alchemy/Phrasea/SearchEngine/Elastic/Thesaurus/Helper.php
index 526d2b1ff0..25f5ce9c48 100644
--- a/lib/Alchemy/Phrasea/SearchEngine/Elastic/Thesaurus/Helper.php
+++ b/lib/Alchemy/Phrasea/SearchEngine/Elastic/Thesaurus/Helper.php
@@ -88,7 +88,7 @@ class Helper
             $document->formatOutput = true;
             $element = $document->createElement('cterms');
             $element->setAttribute('creation_date', date('YmdHis'));
-            $element->setAttribute('next_id', 0);
+            $element->setAttribute('nextid', 0);
             $element->setAttribute('version', '2.0.5');
             $document->appendChild($element);
         }