diff --git a/README.md b/README.md
index 27914d7..90601c9 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 A lightweight Arduino framework for event driven programming.  
   
 ## Concepts
-... PubSub pattern  
+... topic based event channel / pubsub-pattern  
 ... plugin system
 
 
diff --git a/src/EventChannel.h b/src/EventChannel.h
index d82e933..199fd93 100644
--- a/src/EventChannel.h
+++ b/src/EventChannel.h
@@ -1,5 +1,5 @@
-#ifndef __MEDIATOR__
-#define __MEDIATOR__
+#ifndef __SPROCKET_EVENT_CHANNEL__
+#define __SPROCKET_EVENT_CHANNEL__
 
 #include <Arduino.h>
 #include <ArduinoJson.h>