diff --git a/src/include/units/physical/dimensions.h b/src/include/units/physical/dimensions.h
index ea8ceb51..08fff0ae 100644
--- a/src/include/units/physical/dimensions.h
+++ b/src/include/units/physical/dimensions.h
@@ -32,7 +32,7 @@ namespace units {
 namespace physical {
 
 template<typename Dim, template<typename...> typename DimTemplate>
-concept DimensionOf = (Dimension<Dim> || BaseDimension<Dim>) && is_derived_from_instantiation<Dim, DimTemplate>;
+concept DimensionOf = Dimension<Dim> && is_derived_from_instantiation<Dim, DimTemplate>;
 
 template<typename Q, template<typename...> typename DimTemplate>
 concept QuantityOf = Quantity<Q> && is_derived_from_instantiation<typename Q::dimension, DimTemplate>;