diff --git a/htdocs/commande/class/commande.class.php b/htdocs/commande/class/commande.class.php
index a0dbe0df5bd..efd729d3715 100644
--- a/htdocs/commande/class/commande.class.php
+++ b/htdocs/commande/class/commande.class.php
@@ -1047,7 +1047,7 @@ class Commande extends CommonOrder
 		$sql .= ", '".$this->db->escape($this->location_incoterms)."'";
 		$sql .= ", ".(int) $this->entity;
 		$sql .= ", ".($this->module_source ? "'".$this->db->escape($this->module_source)."'" : "null");
-		$sql .= ", ".($this->pos_source != '' ? "'".$this->db->escape($this->pos_source)."'" : "null");
+		$sql .= ", ".((!is_null($this->pos_source) && $this->pos_source != '') ? "'".$this->db->escape($this->pos_source)."'" : "null");	// Can be null, '', '0', '1'
 		$sql .= ", ".(int) $this->fk_multicurrency;
 		$sql .= ", '".$this->db->escape($this->multicurrency_code)."'";
 		$sql .= ", ".(float) $this->multicurrency_tx;