diff --git a/src/include/units/physical/fps/speed.h b/src/include/units/physical/fps/speed.h
index 1f9badf7..d1512a0b 100644
--- a/src/include/units/physical/fps/speed.h
+++ b/src/include/units/physical/fps/speed.h
@@ -37,7 +37,7 @@ using speed = quantity<dim_speed, U, Rep>;
 
 struct mile_per_hour : deduced_unit<mile_per_hour, dim_speed, mile, hour>{};
 
-struct nautical_mile_per_hour :named_deduced_derived_unit<nautical_mile_per_hour, dim_speed, "knot", no_prefix, nautical_mile, hour>{};
+struct nautical_mile_per_hour : named_deduced_unit<nautical_mile_per_hour, dim_speed, "knot", no_prefix, nautical_mile, hour>{};
 
 struct knot : alias_unit<nautical_mile_per_hour, "knot", no_prefix> {};
 
diff --git a/src/include/units/unit.h b/src/include/units/unit.h
index e4c06b4d..832c1153 100644
--- a/src/include/units/unit.h
+++ b/src/include/units/unit.h
@@ -207,7 +207,7 @@ struct noble_deduced_unit : downcast_child<Child, detail::deduced_unit<Dim, U, U
  */
 template<typename Child, DerivedDimension Dim, basic_symbol_text Symbol, PrefixFamily PF, Unit U, Unit... URest>
   requires detail::same_scaled_units<typename Dim::recipe, U, URest...>
-struct named_deduced_derived_unit : downcast_child<Child, detail::deduced_unit<Dim, U, URest...>> {
+struct named_deduced_unit : downcast_child<Child, detail::deduced_unit<Dim, U, URest...>> {
   static constexpr bool is_named = true;
   static constexpr auto symbol = Symbol;
   using prefix_family = PF;