diff --git a/post/invoice_model.php b/post/invoice_model.php
index 40fad24a..0bf5c255 100644
--- a/post/invoice_model.php
+++ b/post/invoice_model.php
@@ -2,3 +2,4 @@
 $date = sanitizeInput($_POST['date']);
 $category = intval($_POST['category']);
 $scope = sanitizeInput($_POST['scope']);
+$invoice_discount = floatval($_POST['invoice_discount']);
\ No newline at end of file