diff --git a/sprout/functional/ref.hpp b/sprout/functional/ref.hpp
index 27ffb812..bd231c67 100644
--- a/sprout/functional/ref.hpp
+++ b/sprout/functional/ref.hpp
@@ -2,6 +2,7 @@
 #define SPROUT_FUNCTIONAL_REF_HPP
 
 #include <type_traits>
+#include <functional>
 #include <sprout/config.hpp>
 #include <sprout/utility/forward.hpp>
 #include <sprout/type_traits/has_xxx.hpp>
@@ -232,6 +233,11 @@ namespace sprout {
 		typedef T type;
 	};
 	template<typename T>
+	struct unwrap_reference<std::reference_wrapper<T> > {
+	public:
+		typedef T type;
+	};
+	template<typename T>
 	struct unwrap_reference<T const>
 		: public sprout::unwrap_reference<T>
 	{};
@@ -258,6 +264,11 @@ namespace sprout {
 		typedef T& type;
 	};
 	template<typename T>
+	struct strip_reference<std::reference_wrapper<T> > {
+	public:
+		typedef T& type;
+	};
+	template<typename T>
 	struct strip_reference<T const>
 		: public sprout::strip_reference<T>
 	{};
@@ -292,6 +303,11 @@ namespace sprout {
 	get_pointer(sprout::reference_wrapper<T> const& r) {
 		return r.get_pointer();
 	}
+	template<typename T>
+	inline SPROUT_CONSTEXPR T*
+	get_pointer(std::reference_wrapper<T> const& r) {
+		return &r.get();
+	}
 }	// namespace sprout
 
 #endif	// #ifndef SPROUT_FUNCTIONAL_REF_HPP
diff --git a/sprout/tuple/tuple/make_tuple.hpp b/sprout/tuple/tuple/make_tuple.hpp
index 51ecf7e4..5e5ca610 100644
--- a/sprout/tuple/tuple/make_tuple.hpp
+++ b/sprout/tuple/tuple/make_tuple.hpp
@@ -5,6 +5,7 @@
 #include <sprout/config.hpp>
 #include <sprout/index_tuple/metafunction.hpp>
 #include <sprout/utility/forward.hpp>
+#include <sprout/functional/ref.hpp>
 #include <sprout/tuple/tuple/tuple.hpp>
 #include <sprout/tuple/tuple/get.hpp>
 #include <sprout/tuple/indexes.hpp>
@@ -15,7 +16,7 @@ namespace sprout {
 		// make_tuple
 		//
 		template<typename... Types>
-		inline SPROUT_CONSTEXPR sprout::tuples::tuple<typename std::decay<Types>::type...>
+		inline SPROUT_CONSTEXPR sprout::tuples::tuple<typename sprout::strip_reference<typename std::decay<Types>::type>::type...>
 		make_tuple(Types&&... args) {
 			return sprout::tuples::tuple<typename std::decay<Types>::type...>(sprout::forward<Types>(args)...);
 		}