diff --git a/MangoPay/InstantConversion.php b/MangoPay/InstantConversion.php
index 781b78c2..9848270f 100644
--- a/MangoPay/InstantConversion.php
+++ b/MangoPay/InstantConversion.php
@@ -83,4 +83,11 @@ class InstantConversion extends Libraries\EntityBase
      * @var int
      */
     public $ExecutionDate;
+
+    /**
+     * Information about the fees taken by the platform for
+     * this transaction (and hence transferred to the Fees Wallet).
+     * @var Money
+     */
+    public $Fees;
 }
diff --git a/tests/Cases/InstantConversionTest.php b/tests/Cases/InstantConversionTest.php
index 78638a95..f59c9903 100644
--- a/tests/Cases/InstantConversionTest.php
+++ b/tests/Cases/InstantConversionTest.php
@@ -66,6 +66,11 @@ private function createInstantConversion()
         $debitedFunds->Amount = 79;
         $instantConversion->DebitedFunds = $debitedFunds;
 
+        $fees = new Money();
+        $fees->Currency = 'EUR';
+        $fees->Amount = 9;
+        $instantConversion->Fees = $fees;
+
         $instantConversion->Tag = "create instant conversion";
 
         return $this->_api->InstantConversion->CreateInstantConversion($instantConversion);