diff --git a/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRD2PullProvider.java b/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRD2PullProvider.java
index 8a937689..513ebf36 100644
--- a/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRD2PullProvider.java
+++ b/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRD2PullProvider.java
@@ -496,18 +496,17 @@ public class ZUGFeRD2PullProvider implements IXMLProvider, IAbsoluteValueProvide
 		// Additional Documents of XRechnung (Rechnungsbegruendende Unterlagen - BG-24 XRechnung)
 		if (trans.getAdditionalReferencedDocuments() != null) {
 			for (FileAttachment f : trans.getAdditionalReferencedDocuments()) {
+				final String documentContent = Base64.encodeBase64String(f.getData());
 				xml = xml + "  <ram:AdditionalReferencedDocument>\n"
 						+ "    <ram:IssuerAssignedID>" + f.getFilename() + "</ram:IssuerAssignedID>\n"
 						+ "    <ram:TypeCode>916</ram:TypeCode>\n"
 						+ "    <ram:Name>" + f.getDescription() + "</ram:Name>\n"
 						+ "    <ram:AttachmentBinaryObject mimeCode=\"" + f.getMimetype() + "\"\n"
-						+ "      filename=\"" + f.getFilename() + ">" + f.getData() + "\n"
+						+ "      filename=\"" + f.getFilename() + ">" + documentContent + "\n"
 						+ "  </ram:AdditionalReferencedDocument>\n";
 			}
 		}
 
-
-
 		xml = xml + "		</ram:ApplicableHeaderTradeAgreement>\n"
 				+ "		<ram:ApplicableHeaderTradeDelivery>\n";
 		if (this.trans.getDeliveryAddress() != null) {