From 0bbec4071f53b38c6c96666102bec93a89c683b7 Mon Sep 17 00:00:00 2001
From: Ian Bell <ian.bell@nist.gov>
Date: Sat, 7 Sep 2024 10:29:21 -0400
Subject: [PATCH] Fix json load for MSVC

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

diff --git a/include/teqp/models/multifluid/multifluid_activity.hpp b/include/teqp/models/multifluid/multifluid_activity.hpp
index 5b15315..82e098c 100644
--- a/include/teqp/models/multifluid/multifluid_activity.hpp
+++ b/include/teqp/models/multifluid/multifluid_activity.hpp
@@ -39,7 +39,7 @@ class MultifluidPlusActivity{
     MultifluidPlusActivity(const nlohmann::json &spec) :
         m_multifluid(multifluidfactory(spec.at("multifluid"))),
         m_activity(ares_model_factory(spec.at("activity").at("aresmodel"))),
-        b(spec.at("activity").at("options").at("b")),
+        b(spec.at("activity").at("options").at("b").get<std::vector<double>>()),
         u(spec.at("activity").at("options").at("u")){}
     
     /// Calculate the dimensionless value of \f$g_{\rm GE}^{\rm E,R}/RT\f$ from the AC model