diff --git a/lib/ronin/recon/engine.rb b/lib/ronin/recon/engine.rb
index 367da85..c18eddb 100644
--- a/lib/ronin/recon/engine.rb
+++ b/lib/ronin/recon/engine.rb
@@ -358,7 +358,7 @@ def on_connection(worker,value,parent)
       #
       # Enqueues a message for processing.
       #
-      # @param [Message::Value, Message::STOP] mesg
+      # @param [Message::Value, Message::SHUTDOWN] mesg
       #   The message object.
       #
       # @raise [NotImplementedError]