diff --git a/src/Scripting/NasalFlightPlan.cxx b/src/Scripting/NasalFlightPlan.cxx index 76a2397d1..202aa30f6 100644 --- a/src/Scripting/NasalFlightPlan.cxx +++ b/src/Scripting/NasalFlightPlan.cxx @@ -22,6 +22,7 @@ #include <algorithm> #include <cstring> +#include <optional> #include "NasalFlightPlan.hxx"