diff --git a/UTILS/PutOrders/puo_notifications.js b/UTILS/PutOrders/puo_notifications.js
index 4abfd570d0..5380ee1a60 100644
--- a/UTILS/PutOrders/puo_notifications.js
+++ b/UTILS/PutOrders/puo_notifications.js
@@ -634,7 +634,7 @@ function getXslName(pNode)
 {
     var fso = new ActiveXObject("Scripting.FileSystemObject");
     var resxslsheet = S("puo_notificationxsl").toLowerCase() || "";
-    if (resxslsheet == "xsl/cust.xsl")
+    if (resxslsheet == "xsl/cust.xsl" || resxslsheet == "") // De laatste is een 'forward compatible'-patch voor tijdens de 2018 -> 2019.1 upgrade
     {
         var custIDxsl = "xsl/" + customerId.toLowerCase() + ".xsl";
         if (fso.FileExists(custabspath + "/" + custIDxsl))