diff --git a/wchat/common/HttpClient.php b/wchat/common/HttpClient.php
index db276b0..2fac68d 100644
--- a/wchat/common/HttpClient.php
+++ b/wchat/common/HttpClient.php
@@ -684,7 +684,7 @@ class HttpClient
 		if ($this->method != self::GET && !empty($this->_data)) {
 			$this->_data = $this->mergeParams($data);
 		} else {
-			$this->_data = $data;
+			$this->_data = $this->mergeParams($data);
 		}
 		curl_setopt($ch, CURLOPT_CUSTOMREQUEST, strtoupper($this->method));