diff --git a/eventuals/raise.h b/eventuals/raise.h
index d4455c93..4361007b 100644
--- a/eventuals/raise.h
+++ b/eventuals/raise.h
@@ -2,6 +2,9 @@
 
 #include <optional>
 
+#include "eventuals/interrupt.h"
+#include "eventuals/type-traits.h"
+
 ////////////////////////////////////////////////////////////////////////
 
 namespace eventuals {
diff --git a/eventuals/undefined.h b/eventuals/undefined.h
index f72b9554..1a5aa455 100644
--- a/eventuals/undefined.h
+++ b/eventuals/undefined.h
@@ -2,6 +2,8 @@
 
 #pragma once
 
+#include <type_traits>
+
 ////////////////////////////////////////////////////////////////////////
 
 namespace eventuals {