diff --git a/include/boost/enable_shared_from_this.hpp b/include/boost/enable_shared_from_this.hpp
index f109aa3..9a71ae2 100644
--- a/include/boost/enable_shared_from_this.hpp
+++ b/include/boost/enable_shared_from_this.hpp
@@ -95,7 +95,7 @@ public:
     {
         init_internal_shared_once();
         get_deleter<detail::sp_deleter_wrapper>(_internal_shared_this)->set_deleter(owner);
-        owner = _internal_shared_this;
+        owner = dynamic_pointer_cast<U>(_internal_shared_this);
         _internal_shared_this.reset();
         _owned = true;
     }