diff --git a/htdocs/contrat/class/contrat.class.php b/htdocs/contrat/class/contrat.class.php
index 60186fe8aef..483301591d7 100644
--- a/htdocs/contrat/class/contrat.class.php
+++ b/htdocs/contrat/class/contrat.class.php
@@ -524,20 +524,20 @@ class Contrat extends CommonObject
 				$objp                  = $this->db->fetch_object($result);
 
 				$line                 = new ContratLigne($this->db);
-				$line->id 			   = $objp->rowid;
+				$line->id 			  = $objp->rowid;
 				$line->fk_contrat     = $objp->fk_contrat;
 				$line->libelle        = $objp->description;
 				$line->desc           = $objp->description;
 				$line->qty            = $objp->qty;
-				$line->statut 		   = $objp->statut;
-				$line->ref            = $objp->ref;
+				$line->statut 		  = $objp->statut;
+				$line->ref            = (isset($objp->ref)?$objp->ref:NULL);
 				$line->tva_tx         = $objp->tva_tx;
 				$line->localtax1_tx   = $objp->localtax1_tx;
 				$line->localtax2_tx   = $objp->localtax2_tx;
 				$line->subprice       = $objp->subprice;
 				$line->remise_percent = $objp->remise_percent;
 				$line->price_ht       = $objp->price_ht;
-				$line->price          = $objp->price;	// For backward compatibility
+				$line->price          = (isset($objp->price)?$objp->price:NULL);	// For backward compatibility
 				$line->total_ht       = $objp->total_ht;
 				$line->total_tva      = $objp->total_tva;
 				$line->total_localtax1= $objp->total_localtax1;
diff --git a/htdocs/product/class/product.class.php b/htdocs/product/class/product.class.php
index 22c6aa0e6c1..b9ad2991738 100644
--- a/htdocs/product/class/product.class.php
+++ b/htdocs/product/class/product.class.php
@@ -431,7 +431,7 @@ class Product extends CommonObject
 		$this->ref = dol_string_nospecial(trim($this->ref));
 		$this->libelle = trim($this->libelle);
 		$this->description = trim($this->description);
-		$this->note = trim($this->note);
+		$this->note = (isset($this->note)? trim($this->note):"null");
 		$this->weight = price2num($this->weight);
 		$this->weight_units = trim($this->weight_units);
 		$this->length = price2num($this->length);