diff --git a/src/Symfony/Component/Validator/Constraints/LengthValidator.php b/src/Symfony/Component/Validator/Constraints/LengthValidator.php
index 97374953e1..9ecfb8c0c9 100644
--- a/src/Symfony/Component/Validator/Constraints/LengthValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/LengthValidator.php
@@ -39,7 +39,6 @@ class LengthValidator extends ConstraintValidator
         }
 
         $stringValue = (string) $value;
-        $invalidCharset = false;
 
         if ('UTF8' === $charset = strtoupper($constraint->charset)) {
             $charset = 'UTF-8'; // iconv on Windows requires "UTF-8" instead of "UTF8"