diff --git a/include/boost/container/experimental/segmented_iterator_traits.hpp b/include/boost/container/experimental/segmented_iterator_traits.hpp
index 0026e68..3d070f6 100644
--- a/include/boost/container/experimental/segmented_iterator_traits.hpp
+++ b/include/boost/container/experimental/segmented_iterator_traits.hpp
@@ -374,7 +374,9 @@ struct deepest_local_iterator
    #endif
 #endif
 
-#if defined(BOOST_CONTAINER_SEGMENTED_ENABLE_PRAGMA_UNROLL)
+#if defined(BOOST_CONTAINER_SEGMENTED_ENABLE_PRAGMA_UNROLL) && defined(BOOST_CONTAINER_SEGMENTED_DISABLE_PRAGMA_UNROLL)
+#error "Can't define both BOOST_CONTAINER_SEGMENTED_ENABLE_PRAGMA_UNROLL and BOOST_CONTAINER_SEGMENTED_DISABLE_PRAGMA_UNROLL"
+#elif defined(BOOST_CONTAINER_SEGMENTED_ENABLE_PRAGMA_UNROLL)
    #define BOOST_CONTAINER_SEGMENTED_UNROLL(N) BOOST_CONTAINER_UNROLL(N)
    #define BOOST_CONTAINER_SEGMENTED_AUTO_UNROLL BOOST_CONTAINER_AUTO_UNROLL
 #elif defined(BOOST_CONTAINER_SEGMENTED_DISABLE_PRAGMA_UNROLL)