diff --git a/source/RobotAPI/libraries/aron/core/type/variant/detail/PrimitiveVariant.h b/source/RobotAPI/libraries/aron/core/type/variant/detail/PrimitiveVariant.h
index ecc86f798b5fc34fc1e49f613503ed6a9e58c8ca..f084df0a9202d7da4609853cbffe8f85936618ab 100644
--- a/source/RobotAPI/libraries/aron/core/type/variant/detail/PrimitiveVariant.h
+++ b/source/RobotAPI/libraries/aron/core/type/variant/detail/PrimitiveVariant.h
@@ -23,6 +23,7 @@
 
 #pragma once
 
+#include <optional>
 
 #include "SpecializedVariant.h"