diff --git a/include/rexy/cx/utility.hpp b/include/rexy/cx/utility.hpp
index 4074450..8deb581 100644
--- a/include/rexy/cx/utility.hpp
+++ b/include/rexy/cx/utility.hpp
@@ -27,11 +27,12 @@ namespace rexy::cx{
 	namespace{
 		template<class T>
 		constexpr void swap(T& l, T& r)
-			noexcept(std::is_nothrow_copy_assignable<T>::value)
+			noexcept(std::is_nothrow_move_assignable<T>::value &&
+			         std::is_nothrow_move_constructible<T>::value)
 		{
-			T tmp = l;
-			l = r;
-			r = tmp;
+			T tmp = std::move(l);
+			l = std::move(r);
+			r = std::move(tmp);
 		}
 		template<class T, class U = T>
 		constexpr T exchange(T& l, U&& r)