diff --git a/include/boost/intrusive/detail/has_member_function_callable_with.hpp b/include/boost/intrusive/detail/has_member_function_callable_with.hpp
index 0d6532e..30bef56 100644
--- a/include/boost/intrusive/detail/has_member_function_callable_with.hpp
+++ b/include/boost/intrusive/detail/has_member_function_callable_with.hpp
@@ -258,7 +258,7 @@ BOOST_INTRUSIVE_HAS_MEMBER_FUNCTION_CALLABLE_WITH_NS_BEG
             {\
                static bool const value = (sizeof(boost_intrusive_hmfcw::no_type) == sizeof(boost_intrusive_hmfcw::is_private_type\
                                                    ( (::boost::move_detail::declval\
-                                                         < struct BOOST_MOVE_CAT(FunWrap##N, BOOST_INTRUSIVE_HAS_MEMBER_FUNCTION_CALLABLE_WITH_FUNCNAME)<Fun> >().\
+                                                         < BOOST_MOVE_CAT(FunWrap##N, BOOST_INTRUSIVE_HAS_MEMBER_FUNCTION_CALLABLE_WITH_FUNCNAME)<Fun> >().\
                                                       BOOST_INTRUSIVE_HAS_MEMBER_FUNCTION_CALLABLE_WITH_FUNCNAME(BOOST_MOVE_DECLVAL##N), 0) )\
                                                 )\
                                           );\