diff --git a/wchat/common/HttpClient.php b/wchat/common/HttpClient.php
index 18958c2..db276b0 100644
--- a/wchat/common/HttpClient.php
+++ b/wchat/common/HttpClient.php
@@ -683,6 +683,8 @@ class HttpClient
 
 		if ($this->method != self::GET && !empty($this->_data)) {
 			$this->_data = $this->mergeParams($data);
+		} else {
+			$this->_data = $data;
 		}
 		curl_setopt($ch, CURLOPT_CUSTOMREQUEST, strtoupper($this->method));