diff --git a/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDInvoiceImporter.java b/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDInvoiceImporter.java
index 1297b1e8..6bbfbf9c 100644
--- a/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDInvoiceImporter.java
+++ b/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDInvoiceImporter.java
@@ -527,9 +527,12 @@ public class ZUGFeRDInvoiceImporter {
 		BigDecimal duePayableAmount = null;
 		if (lineDueNodes.getLength() > 0) {
 			String duePayableAmountStr=XMLTools.trimOrNull(lineDueNodes.item(0));
-			if ((zpp instanceof CalculatedInvoice) && (duePayableAmountStr!=null)) {
+			if (duePayableAmountStr!=null) {
+			  // Always set it, because it is used in the calculation below
 				duePayableAmount = new BigDecimal(duePayableAmountStr);
-				((CalculatedInvoice) zpp).setDuePayable(duePayableAmount);
+				if (zpp instanceof CalculatedInvoice) {
+					((CalculatedInvoice) zpp).setDuePayable(duePayableAmount);
+				}
 			}
 		}