diff --git a/include/boost/smart_ptr/allocate_local_shared_array.hpp b/include/boost/smart_ptr/allocate_local_shared_array.hpp
index f46f110..7591ba6 100644
--- a/include/boost/smart_ptr/allocate_local_shared_array.hpp
+++ b/include/boost/smart_ptr/allocate_local_shared_array.hpp
@@ -30,7 +30,7 @@ struct lsp_if_size_array<T[N]> {
     typedef boost::local_shared_ptr<T[N]> type;
 };
 
-class lsp_array_base
+class BOOST_SYMBOL_VISIBLE lsp_array_base
     : public local_counted_base {
 public:
     void set(sp_counted_base* base) BOOST_SP_NOEXCEPT {
diff --git a/include/boost/smart_ptr/detail/local_counted_base.hpp b/include/boost/smart_ptr/detail/local_counted_base.hpp
index fdfe2c6..bda5f70 100644
--- a/include/boost/smart_ptr/detail/local_counted_base.hpp
+++ b/include/boost/smart_ptr/detail/local_counted_base.hpp
@@ -27,7 +27,7 @@ namespace boost
 namespace detail
 {
 
-class local_counted_base
+class BOOST_SYMBOL_VISIBLE local_counted_base
 {
 private:
 
@@ -89,7 +89,7 @@ public:
     }
 };
 
-class local_counted_impl: public local_counted_base
+class BOOST_SYMBOL_VISIBLE local_counted_impl: public local_counted_base
 {
 private:
 
@@ -124,7 +124,7 @@ public:
     }
 };
 
-class local_counted_impl_em: public local_counted_base
+class BOOST_SYMBOL_VISIBLE local_counted_impl_em: public local_counted_base
 {
 public: