diff --git a/src/Symfony/Component/Validator/Constraints/MaxValidator.php b/src/Symfony/Component/Validator/Constraints/MaxValidator.php
index 90c9437b2f..18d8e8902e 100644
--- a/src/Symfony/Component/Validator/Constraints/MaxValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/MaxValidator.php
@@ -31,7 +31,7 @@ class MaxValidator extends ConstraintValidator
      */
     public function validate($value, Constraint $constraint)
     {
-        if (null === $value) {
+        if (null === $value || '' === $value) {
             return;
         }
 
diff --git a/src/Symfony/Component/Validator/Constraints/MinValidator.php b/src/Symfony/Component/Validator/Constraints/MinValidator.php
index 4ffe43ab63..a91d873864 100644
--- a/src/Symfony/Component/Validator/Constraints/MinValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/MinValidator.php
@@ -31,7 +31,7 @@ class MinValidator extends ConstraintValidator
      */
     public function validate($value, Constraint $constraint)
     {
-        if (null === $value) {
+        if (null === $value || '' === $value) {
             return;
         }