diff --git a/src/Symfony/Component/Console/Output/StreamOutput.php b/src/Symfony/Component/Console/Output/StreamOutput.php
index 80c352a278..f3708ecffe 100644
--- a/src/Symfony/Component/Console/Output/StreamOutput.php
+++ b/src/Symfony/Component/Console/Output/StreamOutput.php
@@ -70,7 +70,7 @@ class StreamOutput extends Output
      */
     protected function doWrite($message, $newline)
     {
-        if (false === @fwrite($this->stream, $message.($newline ? PHP_EOL : ''))) {
+        if (false === @fwrite($this->stream, $message) || ($newline && (false === @fwrite($this->stream, PHP_EOL)))) {
             // should never happen
             throw new \RuntimeException('Unable to write output.');
         }