diff --git a/yandex/cloud/kms/v1/symmetric_crypto_service.proto b/yandex/cloud/kms/v1/symmetric_crypto_service.proto
index 94fcf0d9..d1e93768 100644
--- a/yandex/cloud/kms/v1/symmetric_crypto_service.proto
+++ b/yandex/cloud/kms/v1/symmetric_crypto_service.proto
@@ -77,7 +77,6 @@ message SymmetricDecryptRequest {
   bytes aad_context = 2 [(length) = "<=8192"];
 
   // Ciphertext to be decrypted.
-  // Should be encoded with base64.
   bytes ciphertext = 3 [(required) = true];
 }