diff --git a/src/core/include/mp-units/bits/core_gmf.h b/src/core/include/mp-units/bits/core_gmf.h
index f5392c21..5566bc92 100644
--- a/src/core/include/mp-units/bits/core_gmf.h
+++ b/src/core/include/mp-units/bits/core_gmf.h
@@ -55,6 +55,7 @@
 #if MP_UNITS_HOSTED
 #include <mp-units/ext/format.h>
 #ifndef MP_UNITS_IMPORT_STD
+#include <chrono>
 #include <cmath>
 #include <locale>
 #include <ostream>
diff --git a/src/core/include/mp-units/framework/customization_points.h b/src/core/include/mp-units/framework/customization_points.h
index 6b40e833..43ca0201 100644
--- a/src/core/include/mp-units/framework/customization_points.h
+++ b/src/core/include/mp-units/framework/customization_points.h
@@ -33,6 +33,9 @@ import std;
 #include <concepts>
 #include <limits>
 #include <type_traits>
+#if MP_UNITS_HOSTED
+#include <chrono>
+#endif
 #endif
 #endif
 
@@ -50,11 +53,12 @@ MP_UNITS_EXPORT_BEGIN
  * @tparam Rep a representation type for which a type trait is defined
  */
 template<typename Rep>
-constexpr bool treat_as_floating_point = std::is_floating_point_v<Rep>;
-
-template<typename Rep>
-  requires requires { typename wrapped_type_t<Rep>; }
-constexpr bool treat_as_floating_point<Rep> = treat_as_floating_point<wrapped_type_t<Rep>>;
+constexpr bool treat_as_floating_point =
+#if MP_UNITS_HOSTED
+  std::chrono::treat_as_floating_point_v<value_type_t<Rep>>;
+#else
+  std::is_floating_point_v<value_type_t<Rep>>;
+#endif
 
 /**
  * @brief Specifies a type to have a scalar character