diff --git a/htdocs/eventorganization/conferenceorbooth_list.php b/htdocs/eventorganization/conferenceorbooth_list.php
index e3ba815121c..be8770b6390 100644
--- a/htdocs/eventorganization/conferenceorbooth_list.php
+++ b/htdocs/eventorganization/conferenceorbooth_list.php
@@ -364,8 +364,7 @@ if ($projectid > 0) {
 
 	// Link to the vote/register page
 	print '<tr><td>'.$langs->trans("RegisterPage").'</td><td>';
-	$encodedid = dol_encode($project->id, $dolibarr_main_instance_unique_id);
-	$linkregister = $dolibarr_main_url_root.'/public/project/index.php?id='.$encodedid;
+	$linkregister = $dolibarr_main_url_root.'/public/project/index.php?id='.$project->id;
 	$encodedsecurekey = dol_hash($conf->global->EVENTORGANIZATION_SECUREKEY.'conferenceorbooth'.$project->id, 2);
 	$linkregister .= '&securekey='.urlencode($encodedsecurekey);
 	print '<a target="_blank" href="'.$linkregister.'">'.$linkregister.'</a>';