diff --git a/Eigen/src/Core/Visitor.h b/Eigen/src/Core/Visitor.h
index 5e5eead05..b85747b22 100644
--- a/Eigen/src/Core/Visitor.h
+++ b/Eigen/src/Core/Visitor.h
@@ -338,8 +338,9 @@ struct minmax_coeff_visitor<Derived, is_min, PropagateNaN> : coeff_visitor<Deriv
   }
 };
 
-template<typename Scalar, bool is_min, int NaNPropagation>
-struct functor_traits<minmax_coeff_visitor<Scalar, is_min, NaNPropagation> > {
+template<typename Derived, bool is_min, int NaNPropagation>
+struct functor_traits<minmax_coeff_visitor<Derived, is_min, NaNPropagation> > {
+  using Scalar = typename Derived::Scalar;
   enum {
     Cost = NumTraits<Scalar>::AddCost,
     PacketAccess = packet_traits<Scalar>::HasCmp