diff --git a/extend/fast/Http.php b/extend/fast/Http.php
index 4e98878e39571ad0f4c9ade2ed2fc04b098ad971..c4f25cd56e6b850b140e025df8d29078b2dc140b 100644
--- a/extend/fast/Http.php
+++ b/extend/fast/Http.php
@@ -60,7 +60,7 @@ class Http
             } else {
                 $defaults[CURLOPT_CUSTOMREQUEST] = $method;
             }
-            $defaults[CURLOPT_POSTFIELDS] = $query_string;
+            $defaults[CURLOPT_POSTFIELDS] = $params;
         }
 
         $defaults[CURLOPT_HEADER] = false;