diff --git a/htdocs/fourn/class/fournisseur.facture-rec.class.php b/htdocs/fourn/class/fournisseur.facture-rec.class.php
index fea334e43cf..7d90c239ba7 100644
--- a/htdocs/fourn/class/fournisseur.facture-rec.class.php
+++ b/htdocs/fourn/class/fournisseur.facture-rec.class.php
@@ -79,6 +79,11 @@ class FactureFournisseurRec extends CommonInvoice
 
 	public $suspended;
 	public $libelle;
+
+	/**
+	 * @deprecated
+	 * @var double $amount
+	 */
 	public $amount;
 	public $remise;
 	public $vat_src_code;
diff --git a/htdocs/fourn/class/fournisseur.facture.class.php b/htdocs/fourn/class/fournisseur.facture.class.php
index 24561e08785..176f79a51de 100644
--- a/htdocs/fourn/class/fournisseur.facture.class.php
+++ b/htdocs/fourn/class/fournisseur.facture.class.php
@@ -181,6 +181,10 @@ class FactureFournisseur extends CommonInvoice
 	 */
 	public $date_echeance;
 
+	/**
+	 * @deprecated
+	 * @var double $amount
+	 */
 	public $amount = 0;
 	public $remise = 0;
 
@@ -1174,7 +1178,8 @@ class FactureFournisseur extends CommonInvoice
 			$this->paye = trim($this->paye);
 		}
 		if (isset($this->amount)) {
-			$this->amount = trim($this->amount);
+			if (empty($this->amount)) $this->amount = 0;
+			else $this->amount = doubleval($this->amount);
 		}
 		if (isset($this->remise)) {
 			$this->remise = trim($this->remise);
@@ -1221,7 +1226,8 @@ class FactureFournisseur extends CommonInvoice
 			$this->fk_facture_source = trim($this->fk_facture_source);
 		}
 		if (isset($this->fk_project)) {
-			$this->fk_project = trim($this->fk_project);
+			if (empty($this->fk_project)) $this->fk_project = null;
+			else $this->fk_project = intval($this->fk_project);
 		}
 		if (isset($this->cond_reglement_id)) {
 			$this->cond_reglement_id = trim($this->cond_reglement_id);