Add missing include optional

Ultimaker · Nov 8, 2023 · 3cfce83 · 3cfce83
1 parent 3002b3b
commit 3cfce83
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/progress/Progress.cpp b/src/progress/Progress.cpp
@@ -1,9 +1,10 @@
-// Copyright (c) 2022 Ultimaker B.V.
+// Copyright (c) 2023 UltiMaker
 // CuraEngine is released under the terms of the AGPLv3 or higher
 
 #include "progress/Progress.h"
 
 #include <cassert>
+#include <optional>
 
 #include <range/v3/view/enumerate.hpp>
 #include <spdlog/spdlog.h>