diff --git a/src/dbzero/core/memory/utils.hpp b/src/dbzero/core/memory/utils.hpp
index 75099b23..e3cdac15 100644
--- a/src/dbzero/core/memory/utils.hpp
+++ b/src/dbzero/core/memory/utils.hpp
@@ -9,6 +9,7 @@
 #include "config.hpp"
 #include "Address.hpp"
 #include <dbzero/core/exception/Exceptions.hpp>
+#include <optional>
 
 namespace db0