Fix build with gcc11

2021-07-15 10:18:03 +02:00 · 2021-07-15 10:18:03 +02:00 · 6a1c75e5ee
commit 6a1c75e5ee
parent 16e41ab819
1 changed files with 1 additions and 0 deletions
--- a/src/libslic3r/Optimize/Optimizer.hpp
+++ b/src/libslic3r/Optimize/Optimizer.hpp
@ -8,6 +8,7 @@
 #include <functional>
 #include <limits>
 #include <cassert>
+#include <optional>

 namespace Slic3r { namespace opt {