diff --git a/htdocs/fourn/class/fournisseur.facture.class.php b/htdocs/fourn/class/fournisseur.facture.class.php
index 3eefa40aab5..fd4bea74d91 100644
--- a/htdocs/fourn/class/fournisseur.facture.class.php
+++ b/htdocs/fourn/class/fournisseur.facture.class.php
@@ -3414,10 +3414,10 @@ class SupplierInvoiceLine extends CommonObjectLine
 		$sql .= ", total_localtax1= ".price2num($this->total_localtax1);
 		$sql .= ", total_localtax2= ".price2num($this->total_localtax2);
 		$sql .= ", total_ttc = ".price2num($this->total_ttc);
-		$sql .= ", fk_product = ".$fk_product;
+		$sql .= ", fk_product = ".((int) $fk_product);
 		$sql .= ", product_type = ".((int) $this->product_type);
 		$sql .= ", info_bits = ".((int) $this->info_bits);
-		$sql .= ", fk_unit = ".$fk_unit;
+		$sql .= ", fk_unit = ".((int) $fk_unit);
 
 		// Multicurrency
 		$sql .= " , multicurrency_subprice=".price2num($this->multicurrency_subprice)."";