diff --git a/src/Transaction.php b/src/Transaction.php
index a8c37bab..a0984334 100644
--- a/src/Transaction.php
+++ b/src/Transaction.php
@@ -166,6 +166,9 @@ public static function start($options = array())
             if (isset($options['invoiceAddress']['country'])) {
                 $invoiceAddress['countryCode'] = $options['invoiceAddress']['country'];
             }
+            if (isset($options['invoiceAddress']['gender'])) {
+                $invoiceAddress['gender'] = $options['invoiceAddress']['gender'];
+            }
 
             $enduser['invoiceAddress'] = $invoiceAddress;
         }
@@ -255,4 +258,4 @@ public static function refund($transactionId, $amount = null,
 
         return new Result\Refund($result);
     }
-}
\ No newline at end of file
+}
diff --git a/tests/TransactionTest.php b/tests/TransactionTest.php
index a229c231..3c641228 100755
--- a/tests/TransactionTest.php
+++ b/tests/TransactionTest.php
@@ -85,6 +85,7 @@ private function startTransactionFull()
                 'zipCode' => '5678CD',
                 'city' => 'ITest',
                 'country' => 'NL',
+                'gender' => 'F'
             ),
         ));
         return $result;