diff --git a/libcxx/include/__functional_base b/libcxx/include/__functional_base
index af9e6238759f638359f9631bfc3023eb706074b1..22ac94719a656d0443b5a017151677f1e7d77452 100644
--- a/libcxx/include/__functional_base
+++ b/libcxx/include/__functional_base
@@ -430,6 +430,14 @@ __invoke(_R _T::* __f, _T1&& __t1)
 
 // fifth bullet
 
+template <class _R, class ..._Param, class ..._Args>
+inline _LIBCPP_INLINE_VISIBILITY
+_R
+__invoke(_R (*__f)(_Param...), _Args&& ...__args)
+{
+    return __f(_STD::forward<_Args>(__args)...);
+}
+
 template <class _F, class ..._T>
 inline _LIBCPP_INLINE_VISIBILITY
 typename result_of<_F(_T...)>::type