diff --git a/htdocs/bom/class/bom.class.php b/htdocs/bom/class/bom.class.php
index 4dfb47a3887..7f9a1aa09c6 100644
--- a/htdocs/bom/class/bom.class.php
+++ b/htdocs/bom/class/bom.class.php
@@ -1073,7 +1073,7 @@ class BOM extends CommonObject
 					if ($res>0) {
 						$bom_child->calculateCosts();
 						$line->childBom[] = $bom_child;
-						$line->total_cost = price2num( $bom_child->total_cost  * $line->qty, 'MT');
+						$line->total_cost = price2num($bom_child->total_cost  * $line->qty, 'MT');
 						$this->total_cost += $line->total_cost;
 					} else {
 						$this->error = $bom_child->error;