diff --git a/src/Httpful/Request.php b/src/Httpful/Request.php
index 70f72c1..01ec112 100755
--- a/src/Httpful/Request.php
+++ b/src/Httpful/Request.php
@@ -322,7 +322,8 @@ public function authenticateWithCert($cert, $key, $passphrase = null, $encoding
      * Set the body of the request
      * @return Request this
      * @param mixed $payload
-     * @param string $mimeType
+     * @param string $mimeType currently, sets the sends AND expects mime type although this
+     *    behavior may change in the next minor release (as it is a potential breaking change).
      */
     public function body($payload, $mimeType = null)
     {