diff --git a/main/mashape/http/HttpClient.php b/main/mashape/http/HttpClient.php
index b5a8ef2..b0f5601 100755
--- a/main/mashape/http/HttpClient.php
+++ b/main/mashape/http/HttpClient.php
@@ -65,6 +65,9 @@ class HttpClient {
 
 	private static function execRequest($httpMethod, $url, $parameters, $authHandlers) {
 		$data = null;
+		if ($parameters == null) {
+			$parameters = array();
+		}
 		
 		$headers = array();
         $headers[] = UrlUtils::generateClientHeaders();