diff --git a/wchat/common/HttpClient.php b/wchat/common/HttpClient.php
index 9d0da58..df8be86 100644
--- a/wchat/common/HttpClient.php
+++ b/wchat/common/HttpClient.php
@@ -523,6 +523,9 @@ class HttpClient
 	 */
 	private function createRequestUrl($url, $data)
 	{
+		if (empty($data)) {
+			return $url;
+		}
 		if ($this->isGet()) {
 			return $url . '?' . $data;
 		}