diff --git a/src/Bundle/ChillMainBundle/Validation/Validator/ValidPhonenumber.php b/src/Bundle/ChillMainBundle/Validation/Validator/ValidPhonenumber.php
index 9620f7cb9..267b2a70b 100644
--- a/src/Bundle/ChillMainBundle/Validation/Validator/ValidPhonenumber.php
+++ b/src/Bundle/ChillMainBundle/Validation/Validator/ValidPhonenumber.php
@@ -43,7 +43,7 @@ final class ValidPhonenumber extends ConstraintValidator
             return;
         }
 
-        if ('' === $value) {
+        if (null === $value) {
             return;
         }