From b40814e58b4bc1c1579f99fbcdaa1d09f5b57f4a Mon Sep 17 00:00:00 2001
From: Patrick Wuttke <mewin@mewin.de>
Date: Fri, 26 Jul 2024 23:26:42 +0200
Subject: [PATCH] Added missing include.

---
 source/mijin/container/optional.hpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/source/mijin/container/optional.hpp b/source/mijin/container/optional.hpp
index fb48971..6d49780 100644
--- a/source/mijin/container/optional.hpp
+++ b/source/mijin/container/optional.hpp
@@ -5,6 +5,7 @@
 #define MIJIN_CONTAINER_OPTIONAL_HPP_INCLUDED 1
 
 #include <cstdint>
+#include <functional>
 #include <utility>
 #include "../debug/assert.hpp"
 #include "../util/concepts.hpp"