diff --git a/src/core/include/units/quantity_cast.h b/src/core/include/units/quantity_cast.h
index 5657d421..ea4b8412 100644
--- a/src/core/include/units/quantity_cast.h
+++ b/src/core/include/units/quantity_cast.h
@@ -82,10 +82,10 @@ template<typename From, typename To>
 };
 
 template<typename From, typename To>
-  requires(!common_type_with_<std::common_type_t<From, To>, std::intmax_t>) &&
+  requires(!common_type_with_<std::common_type_t<From, To>, std::intmax_t> &&
           scalable_number_<std::common_type_t<From, To>,
                            std::intmax_t>&& requires { typename std::common_type_t<From, To>::value_type; } &&
-  common_type_with_<typename std::common_type_t<From, To>::value_type, std::intmax_t> struct cast_traits<From, To> {
+  common_type_with_<typename std::common_type_t<From, To>::value_type, std::intmax_t>) struct cast_traits<From, To> {
   using ratio_type = std::common_type_t<typename std::common_type_t<From, To>::value_type, std::intmax_t>;
   using rep_type = std::common_type_t<From, To>;
 };