diff --git a/htdocs/compta/facture.php b/htdocs/compta/facture.php
index b562c25e711..7297b16f635 100644
--- a/htdocs/compta/facture.php
+++ b/htdocs/compta/facture.php
@@ -851,12 +851,14 @@ if (($_POST['action'] == 'addline' || $_POST['action'] == 'addline_predef') && $
 			{
 				$pu_ht = $prod->multiprices[$object->client->price_level];
 				$pu_ttc = $prod->multiprices_ttc[$object->client->price_level];
+				$price_min = $prod->multiprices_min[$object->client->price_level];
 				$price_base_type = $prod->multiprices_base_type[$object->client->price_level];
 			}
 			else
 			{
 				$pu_ht = $prod->price;
 				$pu_ttc = $prod->price_ttc;
+				$price_min = $prod->price_min;
 				$price_base_type = $prod->price_base_type;
 			}
 
@@ -905,7 +907,7 @@ if (($_POST['action'] == 'addline' || $_POST['action'] == 'addline_predef') && $
 
 		if ($result >= 0)
 		{
-			if($prod->price_min && (price2num($pu_ht)*(1-price2num($_POST['remise_percent'])/100) < price2num($prod->price_min)))
+			if($price_min && (price2num($pu_ht)*(1-price2num($_POST['remise_percent'])/100) < price2num($price_min)))
 			{
 				$object->error = $langs->trans("CantBeLessThanMinPrice",price2num($prod->price_min,'MU').' '.$langs->trans("Currency".$conf->monnaie)) ;
 				$result = -1 ;