diff --git a/Mail/mimePart.php b/Mail/mimePart.php
index a0e5522..217e49c 100644
--- a/Mail/mimePart.php
+++ b/Mail/mimePart.php
@@ -302,11 +302,11 @@ public function __construct($body = '', $params = array())
      *
      * @param string $boundary Pre-defined boundary string
      *
-     * @return An associative array containing two elements,
-     *         body and headers. The headers element is itself
-     *         an indexed array. On error returns PEAR error object.
+     * @return array An associative array containing two elements,
+     *               body and headers. The headers element is itself
+     *               an indexed array. On error returns PEAR error object.
      */
-    public function encode($boundary=null)
+    public function encode($boundary = null)
     {
         $encoded =& $this->encoded;