diff --git a/activesupport/lib/active_support/message_encryptors.rb b/activesupport/lib/active_support/message_encryptors.rb
index 44d4374cfc0b4..4fc3d20a1c0ba 100644
--- a/activesupport/lib/active_support/message_encryptors.rb
+++ b/activesupport/lib/active_support/message_encryptors.rb
@@ -130,6 +130,7 @@ class MessageEncryptors < Messages::RotationCoordinator
     # indicate whether old option sets are still in use or can be removed from
     # rotation.
 
+    ##
     private
       def build(salt, secret_generator:, secret_generator_options:, **options)
         secret_length = MessageEncryptor.key_len(*options[:cipher])
diff --git a/activesupport/lib/active_support/message_verifiers.rb b/activesupport/lib/active_support/message_verifiers.rb
index 8cbd1047989e8..0f7733a3a493e 100644
--- a/activesupport/lib/active_support/message_verifiers.rb
+++ b/activesupport/lib/active_support/message_verifiers.rb
@@ -126,6 +126,7 @@ class MessageVerifiers < Messages::RotationCoordinator
     # indicate whether old option sets are still in use or can be removed from
     # rotation.
 
+    ##
     private
       def build(salt, secret_generator:, secret_generator_options:, **options)
         MessageVerifier.new(secret_generator.call(salt, **secret_generator_options), **options)