diff --git a/deps/ox/src/ox/std/typetraits.hpp b/deps/ox/src/ox/std/typetraits.hpp
index ee8ac99b..fba353a2 100644
--- a/deps/ox/src/ox/std/typetraits.hpp
+++ b/deps/ox/src/ox/std/typetraits.hpp
@@ -53,6 +53,15 @@ using false_type = integral_constant<bool, false>;
 using true_type = integral_constant<bool, true>;
 
 
+// is_const    /////////////////////////////////////////////////////////////////
+
+template<typename T>
+constexpr bool is_const_v = false;
+
+template<typename T>
+constexpr bool is_const_v<const T> = true;
+
+
 // is_integral /////////////////////////////////////////////////////////////////
 
 template<typename T> struct is_integral: false_type {};