diff --git a/Atomic/Mailbox.h b/Atomic/Mailbox.h
index fc8a276..936ab81 100644
--- a/Atomic/Mailbox.h
+++ b/Atomic/Mailbox.h
@@ -15,7 +15,6 @@ static_assert( __cplusplus > 2020'99 );
 #include <Alepha/Thread.h>
 #include <Alepha/Exception.h>
 #include <Alepha/assertion.h>
-#include <Alepha/Event.h>
 
 namespace Alepha::Hydrogen::Atomic  ::detail::  Mailbox_m
 {