diff --git a/htdocs/compta/facture.php b/htdocs/compta/facture.php
index 63b8f2a102b..39d603a6c5e 100644
--- a/htdocs/compta/facture.php
+++ b/htdocs/compta/facture.php
@@ -611,7 +611,7 @@ if (empty($reshook))
 			$i = 0;
 			foreach ($object->lines as $line)
 			{
-				if (empty($line->product_type >= 9) && $line->total_ht != 0) // Remove lines with product_type greater than or equal to 9
+				if ($line->product_type < 9 && $line->total_ht != 0) // Remove lines with product_type greater than or equal to 9
 				{ 	// no need to create discount if amount is null
 					$amount_ht[$line->tva_tx] += $line->total_ht;
 					$amount_tva[$line->tva_tx] += $line->total_tva;