From 04bcc7963bbb3f244899da3866248c666cbaecf5 Mon Sep 17 00:00:00 2001
From: Alexander Schmidt <alexander.schmidt@avvaneo.com>
Date: Fri, 21 Apr 2017 11:54:32 +0200
Subject: [PATCH] add reference document number for invoice corrections

---
 .../main/java/org/mustangproject/ZUGFeRD/ZUGFeRDExporter.java   | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mustang/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDExporter.java b/mustang/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDExporter.java
index 51e5868b..8f25dee2 100644
--- a/mustang/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDExporter.java
+++ b/mustang/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDExporter.java
@@ -432,7 +432,7 @@ public class ZUGFeRDExporter {
             regularInfo.getContent().add(regularInfoContent);
             document.getIncludedNote().add(regularInfo);
         }
-        if (trans.getReferenceNumber() != null && trans.getReferenceNumber() != new String()){
+        if (trans.getReferenceNumber() != null && !new String().equals(trans.getReferenceNumber())){
             NoteType referenceInfo = xmlFactory.createNoteType();
             TextType referenceInfoContent = xmlFactory.createTextType();
             referenceInfoContent.setValue("Ursprungsbeleg: " + trans.getReferenceNumber());