diff --git a/include/boost/container/experimental/segmented_iterator_traits.hpp b/include/boost/container/experimental/segmented_iterator_traits.hpp
index 7ad1dba..c7a631a 100644
--- a/include/boost/container/experimental/segmented_iterator_traits.hpp
+++ b/include/boost/container/experimental/segmented_iterator_traits.hpp
@@ -46,6 +46,9 @@ struct segduo
 {
    T1 first;
    T2 second;
+
+   BOOST_CONTAINER_FORCEINLINE segduo() {}
+   BOOST_CONTAINER_FORCEINLINE segduo(const T1 &f, const T2 &s) : first(f), second(s) {}
 };
 
 struct unreachable_sentinel_t