diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index b2d2d04..ba59069 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -68,7 +68,7 @@ jobs:
             cmake_prefix_path: ""
             cmake_flags: ""
             build_type: "Release"
-            cxx_flags: ""
+            cxx_flags: "/EHsc"
             python_version: "3.12"
             pffdtd_engine_2d: "build/src/cpp/pffdtd-engine.exe"
             pffdtd_engine_3d: "build/src/cpp/pffdtd-engine.exe"
diff --git a/src/cpp/pffdtd/engine_cpu_2d.cpp b/src/cpp/pffdtd/engine_cpu_2d.cpp
index bf0caec..ef507cb 100644
--- a/src/cpp/pffdtd/engine_cpu_2d.cpp
+++ b/src/cpp/pffdtd/engine_cpu_2d.cpp
@@ -31,7 +31,7 @@ auto run(Simulation2D const& sim) {
   auto const Nb         = static_cast<int64_t>(sim.adj_bn.size());
   auto const Ns         = static_cast<int64_t>(sim.in_ixy.size());
   auto const Nr         = static_cast<int64_t>(sim.out_ixy.size());
-  auto const lossFactor = sim.loss_factor;
+  auto const lossFactor = static_cast<Real>(sim.loss_factor);
 
   auto u0_buf  = stdex::mdarray<Real, stdex::dextents<size_t, 1>>(Npts);
   auto u1_buf  = stdex::mdarray<Real, stdex::dextents<size_t, 1>>(Npts);