diff --git a/fit/detail/make.h b/fit/detail/make.h
index 33e2820..aeb818c 100644
--- a/fit/detail/make.h
+++ b/fit/detail/make.h
@@ -16,6 +16,8 @@ namespace fit { namespace detail {
 template<template<class...> class Adaptor>
 struct make
 {
+	constexpr make()
+	{}
     template<class... Fs>
     constexpr FIT_JOIN(Adaptor, Fs...) operator()(Fs... fs) const
     {