diff --git a/vatValidation.class.php b/vatValidation.class.php
index f2726e8..39875cf 100644
--- a/vatValidation.class.php
+++ b/vatValidation.class.php
@@ -4,7 +4,7 @@ class vatValidation
 	const WSDL = "http://ec.europa.eu/taxation_customs/vies/checkVatService.wsdl";
 	private $_client = null;
 
-	private $options  = array(
+	private $_options  = array(
 						'debug' => false,
 						);