diff --git a/htdocs/core/lib/price.lib.php b/htdocs/core/lib/price.lib.php
index a39071fbc52..ef1e43b17df 100644
--- a/htdocs/core/lib/price.lib.php
+++ b/htdocs/core/lib/price.lib.php
@@ -46,7 +46,22 @@
  *		@param	int		$info_bits					Miscellanous informations on line
  *		@param	int		$type						0/1=Product/service
  *		@param  string	$seller						Thirdparty seller (we need $seller->country_code property). Provided only if seller is the supplier.
- *		@return result[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15]	(total_ht, total_vat, total_ttc, pu_ht, pu_tva, pu_ttc, total_ht_without_discount, total_vat_without_discount, total_ttc_without_discount, ...)
+ *		@return result[ 0=total_ht, 
+ *						 1=total_vat, 
+ *						 2=total_ttc, 
+ *						 3=pu_ht, 
+ *						 4=pu_tva, 
+ *						 5=pu_ttc, 
+ *						 6=total_ht_without_discount, 
+ *						 7=total_vat_without_discount, 
+ *						 8=total_ttc_without_discount, 
+ *						 9=amount tax1 for total_ht, 
+ *						10=amount tax2 for total_ht, 
+ *						11=amount tax1 for pu_ht, 
+ *						12=amount tax2 for pu_ht, 
+ *						13=not used???, 
+ *						14=amount tax1 for total_ht_without_discount, 
+ *						15=amount tax1 for total_ht_without_discount]
  */
 function calcul_price_total($qty, $pu, $remise_percent_ligne, $txtva, $uselocaltax1_rate, $uselocaltax2_rate, $remise_percent_global, $price_base_type, $info_bits, $type, $seller = '')
 {
@@ -183,6 +198,7 @@ function calcul_price_total($qty, $pu, $remise_percent_ligne, $txtva, $uselocalt
     {
     	$tot_sans_remise= price2num($tot_sans_remise / (1 + ($txtva / 100)),'MU');
     	$tot_avec_remise= price2num($tot_avec_remise / (1 + ($txtva / 100)),'MU');
+    	$pu = price2num($pu / (1 + ($txtva / 100)),'MU');
     }
 
 	$apply_tax = false;