diff --git a/htdocs/comm/propal/list.php b/htdocs/comm/propal/list.php
index f7fd5d9b2bb..a8e51d32173 100644
--- a/htdocs/comm/propal/list.php
+++ b/htdocs/comm/propal/list.php
@@ -283,7 +283,7 @@ if ($search_country) $sql .= " AND s.fk_pays IN (".$db->escape($search_country).
 if ($search_type_thirdparty) $sql .= " AND s.fk_typent IN (".$db->escape($search_type_thirdparty).')';
 if ($search_ref)         $sql .= natural_search('p.ref', $search_ref);
 if ($search_refcustomer) $sql .= natural_search('p.ref_client', $search_refcustomer);
-if ($search_refproject) $sql .= natural_search('pr.ref', $search_refprojet);
+if ($search_refproject) $sql .= natural_search('pr.ref', $search_refproject);
 
 if ($search_societe)     $sql .= natural_search('s.nom', $search_societe);
 if ($search_login)       $sql .= natural_search("u.login", $search_login);