diff --git a/Validator/AdditionalPaymentInfoValidator.php b/Validator/AdditionalPaymentInfoValidator.php
index 9917a42..3de32b1 100644
--- a/Validator/AdditionalPaymentInfoValidator.php
+++ b/Validator/AdditionalPaymentInfoValidator.php
@@ -15,7 +15,7 @@ public function validateCardData(array $data): bool
 
     public function validateBlikIfPresent(array $data): bool
     {
-        return 6 !== strlen($data[TpayInterface::BLIK_CODE]);
+        return 6 === strlen($data[TpayInterface::BLIK_CODE]);
     }
 
     public function validatePresenceOfGroupOrChannel(array $data): bool