From 37f98ae4e889f05ff1194bb48b5a4ebaeac0940d Mon Sep 17 00:00:00 2001
From: Ian Bell <ian.bell@nist.gov>
Date: Mon, 6 Jan 2025 15:47:50 -0500
Subject: [PATCH] Add missing using namespace

---
 include/teqp/models/multifluid/multifluid_activity.hpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/teqp/models/multifluid/multifluid_activity.hpp b/include/teqp/models/multifluid/multifluid_activity.hpp
index 82e098c..9c00e6b 100644
--- a/include/teqp/models/multifluid/multifluid_activity.hpp
+++ b/include/teqp/models/multifluid/multifluid_activity.hpp
@@ -7,6 +7,8 @@
 
 namespace teqp::multifluid::multifluid_activity {
 
+using namespace teqp::activity::activity_models;
+
 template<typename M, typename T, typename U>
 concept CallableLnGammaResid = requires(M m, T t, U u) {
     { m.calc_lngamma_resid(t,u) } -> std::same_as<Eigen::ArrayXd>;