diff --git a/include/boost/variant2/variant.hpp b/include/boost/variant2/variant.hpp
index c9c0d48..a7df153 100644
--- a/include/boost/variant2/variant.hpp
+++ b/include/boost/variant2/variant.hpp
@@ -359,7 +359,15 @@ template<class T1, class... T> union variant_storage_impl<mp_true, T1, T...>
 
     template<std::size_t I, class... A> constexpr void emplace( mp_size_t<I>, A&&... a )
     {
+#if defined( BOOST_LIBSTDCXX_VERSION ) && BOOST_LIBSTDCXX_VERSION < 50000
+
+        this->emplace_impl( mp_all<std::has_trivial_move_assign<T1>, std::has_trivial_move_assign<T>...>(), mp_size_t<I>(), std::forward<A>(a)... );
+
+#else
+
         this->emplace_impl( mp_all<std::is_trivially_move_assignable<T1>, std::is_trivially_move_assignable<T>...>(), mp_size_t<I>(), std::forward<A>(a)... );
+
+#endif
     }
 
     constexpr T1& get( mp_size_t<0> ) noexcept { return first_; }
@@ -495,7 +503,15 @@ template<class... T> struct variant_base_impl<true, true, T...>
         std::size_t const J = I+1;
         using U = mp_at_c<variant<T...>, I>;
 
+#if defined( BOOST_LIBSTDCXX_VERSION ) && BOOST_LIBSTDCXX_VERSION < 50000
+
+        this->emplace_impl<J, U>( std::is_nothrow_constructible<U, A...>(), mp_all<std::has_trivial_move_constructor<U>, std::has_trivial_move_assign<T>...>(), std::forward<A>(a)... );
+
+#else
+
         this->emplace_impl<J, U>( std::is_nothrow_constructible<U, A...>(), mp_all<std::is_trivially_move_constructible<U>, std::is_trivially_move_assignable<T>...>(), std::forward<A>(a)... );
+
+#endif
     }
 };