diff --git a/message.hpp b/message.hpp
index 1deef71..69ef947 100644
--- a/message.hpp
+++ b/message.hpp
@@ -1,5 +1,7 @@
 #pragma once
 
+#include "config.h"
+
 #include <cstddef>
 #include <memory>
 #include <numeric>