diff --git a/src/core/include/mp-units/quantity_point.h b/src/core/include/mp-units/quantity_point.h
index 535a16e0..925c183a 100644
--- a/src/core/include/mp-units/quantity_point.h
+++ b/src/core/include/mp-units/quantity_point.h
@@ -112,18 +112,20 @@ public:
   {
   }
 
-  template<auto R2, typename Rep2>
-    requires std::constructible_from<quantity_type, quantity<R2, Rep2>>
-  constexpr explicit(!std::convertible_to<quantity<R2, Rep2>, quantity_type>)
-    quantity_point(const quantity_point<R2, point_origin, Rep2>& qp) :
-      q_(qp.relative())
-  {
-  }
-
   template<QuantityPointOf<absolute_point_origin> QP>
     requires std::constructible_from<quantity_type, typename QP::quantity_type>
   constexpr explicit(!std::convertible_to<typename QP::quantity_type, quantity_type>) quantity_point(const QP& qp) :
-      q_(qp.absolute() - zero().absolute())
+      q_([&] {
+        if constexpr (std::is_same_v<std::remove_const_t<decltype(point_origin)>,
+                                     std::remove_const_t<decltype(QP::point_origin)>>) {
+          return qp.relative();
+        } else if constexpr (detail::is_derived_from_specialization_of_relative_point_origin<
+                               std::remove_const_t<decltype(point_origin)>>) {
+          return qp.absolute() - zero().absolute();
+        } else {
+          return qp.absolute();
+        }
+      }())
   {
   }