diff --git a/html/labels.html b/html/labels.html
index 23d637d01207e897b1e158da7c6d9f311c31315d..5e4480f3f9509b2f1714f4196b5a42a5f814396d 100644
--- a/html/labels.html
+++ b/html/labels.html
@@ -63,6 +63,8 @@
 <dd>URI of the first ontology (temporary store)</dd>
 <dt>http://exmo.inrialpes.fr/align/service:ouri2</dt>
 <dd>URI of the second ontology (temporary store)</dd>
+<dt>http://exmo.inrialpes.fr/align/service:pretty</dt>
+<dd>Name to be displayed instead of the URI of the alignment</dd>
 </dl>
 
 <h2>Argumentation extensions</h2>