Index: boost/container/detail/utilities.hpp
===================================================================
--- boost/container/detail/utilities.hpp	(revision 84007)
+++ boost/container/detail/utilities.hpp	(working copy)
@@ -1055,18 +1055,21 @@
          ::memcpy(short_ptr, stora_ptr, sizeof_storage);
          large_ptr += sizeof_storage;
          short_ptr += sizeof_storage;
+         BOOST_FALLTHROUGH;
       case 3:
          ::memcpy(stora_ptr, large_ptr, sizeof_storage);
          ::memcpy(large_ptr, short_ptr, sizeof_storage);
          ::memcpy(short_ptr, stora_ptr, sizeof_storage);
          large_ptr += sizeof_storage;
          short_ptr += sizeof_storage;
+         BOOST_FALLTHROUGH;
       case 2:
          ::memcpy(stora_ptr, large_ptr, sizeof_storage);
          ::memcpy(large_ptr, short_ptr, sizeof_storage);
          ::memcpy(short_ptr, stora_ptr, sizeof_storage);
          large_ptr += sizeof_storage;
          short_ptr += sizeof_storage;
+         BOOST_FALLTHROUGH;
       case 1:
          ::memcpy(stora_ptr, large_ptr, sizeof_storage);
          ::memcpy(large_ptr, short_ptr, sizeof_storage);