diff --git a/htdocs/margin/productMargins.php b/htdocs/margin/productMargins.php
index 22dfd0146b1..8ec46c3e8ed 100644
--- a/htdocs/margin/productMargins.php
+++ b/htdocs/margin/productMargins.php
@@ -181,8 +181,8 @@ if ($id > 0) $sql.= " d.fk_product,";
 if ($id > 0) $sql.= " f.rowid as facid, f.ref, f.total as total_ht, f.datef, f.paye, f.fk_statut as statut,";
 $sql.= " SUM(d.total_ht) as selling_price,";
 // Note: qty and buy_price_ht is always positive (if not your database may be corrupted, you can update this)
-$sql.= " SUM(".$db->ifsql('d.total_ht < 0', 'd.qty * d.buy_price_ht * -1', 'd.qty * d.buy_price_ht').") as buying_price,";
-$sql.= " SUM(".$db->ifsql('d.total_ht < 0', '-1 * (abs(d.total_ht) - (d.buy_price_ht * d.qty))', 'd.total_ht - (d.buy_price_ht * d.qty)').") as marge";
+$sql.= " SUM(".$db->ifsql('d.total_ht < 0', 'd.qty * d.buy_price_ht * -1 * (d.situation_percent / 100)', 'd.qty * d.buy_price_ht * (d.situation_percent / 100)').") as buying_price,";
+$sql.= " SUM(".$db->ifsql('d.total_ht < 0', '-1 * (abs(d.total_ht) - (d.buy_price_ht * d.qty * (d.situation_percent / 100)))', 'd.total_ht - (d.buy_price_ht * d.qty * (d.situation_percent / 100))').") as marge";
 $sql.= " FROM ".MAIN_DB_PREFIX."societe as s";
 $sql.= ", ".MAIN_DB_PREFIX."facture as f";
 $sql.= ", ".MAIN_DB_PREFIX."facturedet as d";