diff --git a/src/Symfony/Bundle/FrameworkBundle/Command/ServerRunCommand.php b/src/Symfony/Bundle/FrameworkBundle/Command/ServerRunCommand.php
index be64532a87..2daf5e5f99 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Command/ServerRunCommand.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Command/ServerRunCommand.php
@@ -94,8 +94,8 @@ EOF
         $builder->setWorkingDirectory($input->getOption('docroot'));
         $builder->setTimeout(null);
 
-        $process = $builder->getProcess()->run(function ($type, $buffer) {
-            echo $buffer;
+        $builder->getProcess()->run(function ($type, $buffer) use ($output) {
+            $output->write($buffer);
         });
     }
 }