diff --git a/include/boost/geometry/algorithms/detail/overlay/add_rings.hpp b/include/boost/geometry/algorithms/detail/overlay/add_rings.hpp index fcdb52ad9..d867db1a7 100644 --- a/include/boost/geometry/algorithms/detail/overlay/add_rings.hpp +++ b/include/boost/geometry/algorithms/detail/overlay/add_rings.hpp @@ -9,6 +9,7 @@ #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_ADD_RINGS_HPP #include +#include namespace boost { namespace geometry