diff --git a/launcher/modplatform/modrinth/ModrinthInstanceCreationTask.h b/launcher/modplatform/modrinth/ModrinthInstanceCreationTask.h
index 0879474cf..ddfa7ae95 100644
--- a/launcher/modplatform/modrinth/ModrinthInstanceCreationTask.h
+++ b/launcher/modplatform/modrinth/ModrinthInstanceCreationTask.h
@@ -1,5 +1,6 @@
 #pragma once
 
+#include <optional>
 #include "BaseInstance.h"
 #include "InstanceCreationTask.h"