diff --git a/htdocs/commande/class/commande.class.php b/htdocs/commande/class/commande.class.php
index 499a332e792..d57699b998e 100644
--- a/htdocs/commande/class/commande.class.php
+++ b/htdocs/commande/class/commande.class.php
@@ -638,7 +638,7 @@ class Commande extends CommonOrder
         $sql.= ")";
         $sql.= " VALUES ('(PROV)',".$this->socid.", '".$this->db->idate($now)."', ".$user->id;
         $sql.= ", ".($this->fk_project?$this->fk_project:"null");
-        $sql.= ", ".$this->db->idate($date);
+        $sql.= ", '".$this->db->idate($date)."'";
         $sql.= ", ".($this->source>=0 && $this->source != '' ?$this->source:'null');
         $sql.= ", '".$this->db->escape($this->note_private)."'";
         $sql.= ", '".$this->db->escape($this->note_public)."'";