diff --git a/debug.hpp b/debug.hpp
index c2ed0105..c1dd7df4 100644
--- a/debug.hpp
+++ b/debug.hpp
@@ -527,9 +527,14 @@ namespace cruft::debug::detail {
     void
     unhandled [[noreturn]] (T &&t) noexcept
     {
-        std::ostringstream os;
-        os << "unhandled value: " << t << '\n';
-        ::panic (os.str ());
+        using base_type = std::remove_reference_t<std::decay_t<T>>;
+        if constexpr (std::is_enum_v<base_type>) {
+            unhandled (static_cast<std::underlying_type_t<base_type>> (t));
+        } else {
+            std::ostringstream os;
+            os << "unhandled value: " << t << '\n';
+            ::panic (os.str ());
+        }
     }
 }