diff --git a/src/HttpFactory.php b/src/HttpFactory.php
index <HASH>..<HASH> 100644
--- a/src/HttpFactory.php
+++ b/src/HttpFactory.php
@@ -55,7 +55,7 @@ class HttpFactory
 	 * @since   1.0
 	 * @throws  \InvalidArgumentException
 	 */
-	public static function getAvailableDriver($options, $default = null)
+	public static function getAvailableDriver($options = array(), $default = null)
 	{
 		if (!is_array($options) && !($options instanceof \ArrayAccess))
 		{
Make options param optional, not required to inject into TransportInterface objects