diff --git a/include/magic_enum.hpp b/include/magic_enum.hpp
index 75d3902..e8fc94a 100644
--- a/include/magic_enum.hpp
+++ b/include/magic_enum.hpp
@@ -222,6 +222,8 @@ inline constexpr auto name_v = n<E, V>();
 
 template <typename E, auto V>
 constexpr bool is_valid() noexcept {
+  static_assert(is_enum_v<E>, "magic_enum::detail::is_valid requires enum type.");
+
   return n<E, static_cast<E>(V)>().size() != 0;
 }