From a37df7504bf947161ab9d19fabfd01e4f9f0036e Mon Sep 17 00:00:00 2001
From: Mateusz Pusz <mateusz.pusz@gmail.com>
Date: Mon, 13 Feb 2023 18:17:41 +0100
Subject: [PATCH] fix: `quantity_cast` fixed

---
 src/core/include/mp_units/bits/quantity_cast.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/core/include/mp_units/bits/quantity_cast.h b/src/core/include/mp_units/bits/quantity_cast.h
index 11a19d39..8ad945fd 100644
--- a/src/core/include/mp_units/bits/quantity_cast.h
+++ b/src/core/include/mp_units/bits/quantity_cast.h
@@ -56,7 +56,7 @@ class quantity;
  * @tparam ToQS a quantity specification to use for a target quantity
  */
 template<QuantitySpec auto ToQS, typename Q>
-  requires Quantity<std::remove_cvref_t<Q>> && castable_to(get_quantity_spec(Q::reference), ToQS)
+  requires Quantity<std::remove_cvref_t<Q>> && (castable_to(std::remove_cvref_t<Q>::quantity_spec, ToQS))
 [[nodiscard]] constexpr Quantity auto quantity_cast(Q&& q)
 {
   constexpr reference<ToQS, std::remove_cvref_t<Q>::unit> r;