diff --git a/htdocs/core/class/html.form.class.php b/htdocs/core/class/html.form.class.php
index fc50c21f793..e8ba8fae64a 100644
--- a/htdocs/core/class/html.form.class.php
+++ b/htdocs/core/class/html.form.class.php
@@ -3044,10 +3044,10 @@ class Form
 
 
 				// Add new entry
-				// "key" value of json key array is used by jQuery automatically as selected value
+				// "key" value of json key array is used by jQuery automatically as selected value. Example: 'type' = product or service, 'price_ht' = unit price without tax
 				// "label" value of json key array is used by jQuery automatically as text for combo box
 				$out .= $opt;
-				array_push($outarray, array('key'=>$outkey, 'value'=>$outref, 'label'=>$outval, 'qty'=>$outqty, 'up'=>price2num($objp->unitprice, 'MT'), 'discount'=>$outdiscount, 'type'=>$outtype, 'duration_value'=>$outdurationvalue, 'duration_unit'=>$outdurationunit, 'disabled'=>(empty($objp->idprodfournprice) ?true:false)));
+				array_push($outarray, array('key'=>$outkey, 'value'=>$outref, 'label'=>$outval, 'qty'=>$outqty, 'price_ht'=>price2num($objp->unitprice, 'MT'), 'up'=>price2num($objp->unitprice, 'MT'), 'discount'=>$outdiscount, 'type'=>$outtype, 'duration_value'=>$outdurationvalue, 'duration_unit'=>$outdurationunit, 'disabled'=>(empty($objp->idprodfournprice) ?true:false)));
 				// Exemple of var_dump $outarray
 				// array(1) {[0]=>array(6) {[key"]=>string(1) "2" ["value"]=>string(3) "ppp"
 				//           ["label"]=>string(76) "ppp (<strong>f</strong>ff2) - ppp - 20,00 Euros/1unité (20,00 Euros/unité)"