diff --git a/htdocs/compta/facture/class/facture-rec.class.php b/htdocs/compta/facture/class/facture-rec.class.php
index ef3d96fed53..056d34018fc 100644
--- a/htdocs/compta/facture/class/facture-rec.class.php
+++ b/htdocs/compta/facture/class/facture-rec.class.php
@@ -398,7 +398,7 @@ class FactureRec extends CommonInvoice
 			$sql .= ", '".$this->db->escape($facsrc->multicurrency_code)."'";
 			$sql .= ", ".((float) $facsrc->multicurrency_tx);
 			$sql .= ", ".((int) $this->suspended);
-			$sql .= ", ".((int) $this->fk_societe_rib);
+			$sql .= ", ".(!empty($this->fk_societe_rib) ? ((int) $this->fk_societe_rib) : 'NULL');
 			$sql .= ")";
 
 			if ($this->db->query($sql)) {
@@ -571,7 +571,7 @@ class FactureRec extends CommonInvoice
 		$sql .= " localtax2 = ".((float) $this->total_localtax2).",";
 		$sql .= " total_ht = ".((float) $this->total_ht).",";
 		$sql .= " total_ttc = ".((float) $this->total_ttc).",";
-		$sql .= " fk_societe_rib = ".((int) $this->fk_societe_rib);
+		$sql .= " fk_societe_rib = ".(!empty($this->fk_societe_rib) ? ((int) $this->fk_societe_rib) : 'NULL');;
 		// TODO Add missing fields
 		$sql .= " WHERE rowid = ".((int) $this->id);