diff --git a/libgnucash/engine/gncInvoice.c b/libgnucash/engine/gncInvoice.c
index 35b7f9f91c..592363f89a 100644
--- a/libgnucash/engine/gncInvoice.c
+++ b/libgnucash/engine/gncInvoice.c
@@ -1859,7 +1859,7 @@ gncInvoiceApplyPayment (const GncInvoice *invoice, Transaction *txn,
 gboolean gncInvoiceIsPosted (const GncInvoice *invoice)
 {
     if (!invoice) return FALSE;
-    return GNC_IS_ACCOUNT(gncInvoiceGetPostedAcc(invoice));
+    return GNC_IS_TRANSACTION(gncInvoiceGetPostedTxn(invoice));
 }
 
 gboolean gncInvoiceIsPaid (const GncInvoice *invoice)