diff --git a/lib/listen/listener.rb b/lib/listen/listener.rb
index 6acf4a63..f4688131 100644
--- a/lib/listen/listener.rb
+++ b/lib/listen/listener.rb
@@ -19,6 +19,7 @@
 
 module Listen
   class Listener
+    # TODO: move the state machine's methods private
     include Listen::FSM
 
     # Initializes the directories listener.