diff --git a/htdocs/compta/facture/card.php b/htdocs/compta/facture/card.php
index d8db9191c32..27ad83d35d4 100644
--- a/htdocs/compta/facture/card.php
+++ b/htdocs/compta/facture/card.php
@@ -2237,8 +2237,9 @@ if (empty($reshook)) {
 				$desc = $product_desc;
 				$type = GETPOST('type');
 				$fk_unit = GETPOST('units', 'alpha');
-				$pu_ht_devise = price2num($price_ht_devise, 'MU');
 			}
+			
+			$pu_ht_devise = price2num($price_ht_devise, 'MU');
 
 			// Margin
 			$fournprice = price2num(GETPOST('fournprice'.$predef) ? GETPOST('fournprice'.$predef) : '');
@@ -2286,10 +2287,10 @@ if (empty($reshook)) {
 					if (empty($conf->global->MAIN_DISABLE_PDF_AUTOUPDATE)) {
 						$outputlangs = $langs;
 						$newlang = '';
-						if ($conf->global->MAIN_MULTILANGS && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
+						if (!empty-$conf->global->MAIN_MULTILANGS) && empty($newlang) && GETPOST('lang_id', 'aZ09')) {
 							$newlang = GETPOST('lang_id', 'aZ09');
 						}
-						if ($conf->global->MAIN_MULTILANGS && empty($newlang)) {
+						if (!empty($conf->global->MAIN_MULTILANGS) && empty($newlang)) {
 							$newlang = $object->thirdparty->default_lang;
 						}
 						if (!empty($newlang)) {