diff --git a/modules/invoiceOut/back/methods/invoiceOut/createPdf.js b/modules/invoiceOut/back/methods/invoiceOut/createPdf.js
index 678e7dda54..a787e48a1a 100644
--- a/modules/invoiceOut/back/methods/invoiceOut/createPdf.js
+++ b/modules/invoiceOut/back/methods/invoiceOut/createPdf.js
@@ -1,3 +1,4 @@
+const UserError = require('vn-loopback/util/user-error');
 const fs = require('fs-extra');
 const got = require('got');
 const path = require('path');