diff --git a/src/Symfony/Component/Console/Output/StreamOutput.php b/src/Symfony/Component/Console/Output/StreamOutput.php
index 6a8305c709..86fe1827e9 100644
--- a/src/Symfony/Component/Console/Output/StreamOutput.php
+++ b/src/Symfony/Component/Console/Output/StreamOutput.php
@@ -35,7 +35,7 @@ class StreamOutput extends Output
     /**
      * Constructor.
      *
-     * @param mixed                         $stream    A stream resource
+     * @param resource                      $stream    A stream resource
      * @param int                           $verbosity The verbosity level (one of the VERBOSITY constants in OutputInterface)
      * @param bool|null                     $decorated Whether to decorate messages (null for auto-guessing)
      * @param OutputFormatterInterface|null $formatter Output formatter instance (null to use default OutputFormatter)