diff --git a/src/js/controller.js b/src/js/controller.js
index 29ed063..1803216 100644
--- a/src/js/controller.js
+++ b/src/js/controller.js
@@ -238,7 +238,8 @@ angular.module('focaModalFactura')
                     facturas.forEach(function(factura) {
                         if (factura.TCO === 'CI' ||
                             factura.TCO === 'FT' ||
-                            factura.TCO === 'ND'){
+                            factura.TCO === 'ND' ||
+                            factura.TCO === 'RT'){
                             factura.IPA = factura.IPA * -1;
                         }else{
                             factura.IPA = factura.IPA;