diff --git a/AbaFileGenerator/AbaGenerator.cs b/AbaFileGenerator/AbaGenerator.cs
index 55ec1b9..48ac39f 100644
--- a/AbaFileGenerator/AbaGenerator.cs
+++ b/AbaFileGenerator/AbaGenerator.cs
@@ -222,7 +222,7 @@ private void addTransactionRecord(Transaction transaction)
             line += PadRight(Bsb, 7, PaddingChar);
 
             // Trace Account Number - already validated
-            line += PadLeft(transaction.AccountNumber, 9, PaddingChar);
+            line += PadLeft(AccountNumber, 9, PaddingChar);
 
             // Name of remitter (appears on target's bank statement; must not be blank but some banks will replace with name fund account is held in).
             // Remitter Name - already validated