diff --git a/templates/job-order/cmb.form.walkin.html.twig b/templates/job-order/cmb.form.walkin.html.twig
index 1a833e63..5af0a7cf 100644
--- a/templates/job-order/cmb.form.walkin.html.twig
+++ b/templates/job-order/cmb.form.walkin.html.twig
@@ -946,12 +946,12 @@ var vdata = false;
         generateInvoice();
     });
 
-	// reset the invoice table
-	$("#btn-reset-invoice").click(function() {
-		$("#invoice-discount").prop('selectedIndex', 0);
-		invoiceItems = [];
-		generateInvoice();
-	});
+    // reset the invoice table
+    $("#btn-reset-invoice").click(function() {
+        $("#invoice-discount").val(0);
+        invoiceItems = [];
+        generateInvoice();
+    });
 
     // recompute
     $("#btn-recompute-invoice").click(function() {