diff --git a/src/slic3r/Utils/UndoRedo.hpp b/src/slic3r/Utils/UndoRedo.hpp index 178e5a11a..f8bfda08c 100644 --- a/src/slic3r/Utils/UndoRedo.hpp +++ b/src/slic3r/Utils/UndoRedo.hpp @@ -5,6 +5,7 @@ #include #include #include +#include #include