diff --git a/htdocs/projet/class/project.class.php b/htdocs/projet/class/project.class.php
index 7f8aa6252e8..91a75f80ce1 100644
--- a/htdocs/projet/class/project.class.php
+++ b/htdocs/projet/class/project.class.php
@@ -1121,6 +1121,7 @@ class Project extends CommonObject
 
 		// Load source object
 		$clone_project->fetch($fromid);
+		$clone_project->fetch_optionals();
 		$clone_project->fetch_thirdparty();
 
 		$orign_dt_start=$clone_project->date_start;