diff --git a/src/Symfony/Component/Console/Question/ConfirmationQuestion.php b/src/Symfony/Component/Console/Question/ConfirmationQuestion.php
index 0774599fe5..eaea45e770 100644
--- a/src/Symfony/Component/Console/Question/ConfirmationQuestion.php
+++ b/src/Symfony/Component/Console/Question/ConfirmationQuestion.php
@@ -44,13 +44,14 @@ class ConfirmationQuestion extends Question
     private function getDefaultNormalizer()
     {
         $default = $this->getDefault();
+        $regex = $this->trueAnswerRegex;
 
-        return function ($answer) use ($default) {
+        return function ($answer) use ($default, $regex) {
             if (is_bool($answer)) {
                 return $answer;
             }
 
-            $answerIsTrue = (bool) preg_match($this->trueAnswerRegex, $answer);
+            $answerIsTrue = (bool) preg_match($regex, $answer);
             if (false === $default) {
                 return $answer && $answerIsTrue;
             }