diff --git a/src/Symfony/Component/Console/Helper/QuestionHelper.php b/src/Symfony/Component/Console/Helper/QuestionHelper.php
index 6efec5b5b6..72c270e229 100644
--- a/src/Symfony/Component/Console/Helper/QuestionHelper.php
+++ b/src/Symfony/Component/Console/Helper/QuestionHelper.php
@@ -105,7 +105,7 @@ class QuestionHelper extends Helper
     {
         $this->writePrompt($output, $question);
 
-        $inputStream = $this->inputStream ?: fopen('php://stdin', 'r');
+        $inputStream = $this->inputStream ?: STDIN;
         $autocomplete = $question->getAutocompleterCallback();
 
         if (null === $autocomplete || !self::$stty || !Terminal::hasSttyAvailable()) {