diff --git a/config/sample.config.php b/config/sample.config.php
index eb8904c2c..6193f06ae 100755
--- a/config/sample.config.php
+++ b/config/sample.config.php
@@ -301,6 +301,7 @@
 	define('DEDALO_PREFIX_TIPOS', [
 		'dd',
 		'rsc',
+		'ontology',
 		'hierarchy',
 		'lg',
 		'utoponymy',