diff --git a/src/Symfony/Component/Console/Shell.php b/src/Symfony/Component/Console/Shell.php
index 77561a68bc..1eaa958184 100644
--- a/src/Symfony/Component/Console/Shell.php
+++ b/src/Symfony/Component/Console/Shell.php
@@ -107,10 +107,10 @@ EOF;
     /**
      * Tries to return autocompletion for the current entered text.
      *
-     * @param string  $text     The last segment of the entered text
-     * @param integer $position The current position
+     * @param string $text The last segment of the entered text
+     * @return Boolean|array A list of guessed strings or true
      */
-    private function autocompleter($text, $position)
+    private function autocompleter($text)
     {
         $info = readline_info();
         $text = substr($info['line_buffer'], 0, $info['end']);