diff --git a/htdocs/compta/facture/card-rec.php b/htdocs/compta/facture/card-rec.php
index b15599cc931..a41de0ce755 100644
--- a/htdocs/compta/facture/card-rec.php
+++ b/htdocs/compta/facture/card-rec.php
@@ -765,8 +765,8 @@ if (empty($reshook)) {
 
 		// Define special_code for special lines
 		$special_code = GETPOST('special_code', 'int');
-		if (!GETPOST('qty', 'alpha')) {
-			$special_code = 3;
+		if ($special_code == 3) {
+			$special_code = 0;	// Options should not exists on invoices
 		}
 
 		/*$line = new FactureLigne($db);
diff --git a/htdocs/compta/facture/card.php b/htdocs/compta/facture/card.php
index 4230a22daaf..cedb7cdc0de 100644
--- a/htdocs/compta/facture/card.php
+++ b/htdocs/compta/facture/card.php
@@ -2371,9 +2371,9 @@ if (empty($reshook)) {
 		}
 
 		// Define special_code for special lines
-		$special_code = GETPOST('special_code');
-		if (!GETPOST('qty')) {
-			$special_code = 3;
+		$special_code = GETPOST('special_code', 'int');
+		if ($special_code == 3) {
+			$special_code = 0;	// Options should not exists on invoices
 		}
 
 		$line = new FactureLigne($db);