diff --git a/src/cosim/slave_simulator.cpp b/src/cosim/slave_simulator.cpp
index c16f2d17..2c9492f4 100644
--- a/src/cosim/slave_simulator.cpp
+++ b/src/cosim/slave_simulator.cpp
@@ -549,25 +549,19 @@ class slave_simulator::impl
     void initialize_start_values()
     {
         auto deltaT = duration::zero();
-        auto filter = [this](const value_reference& vr, const std::variant<double, int, bool, std::string>& vt) {
-            variable_type type;
-            std::visit(
-                visitor(
-                    [&](double) { type = variable_type::real; },
-                    [&](int) { type = variable_type::integer; },
-                    [&](bool) { type = variable_type::boolean; },
-                    [&](const std::string&) { type = variable_type::string; }),
-                vt);
-            const auto& vd = this->find_variable_description(vr, type);
-            /// FMI Specification 2.0.4 - Section 4.2.4
-            return vd.variability != variable_variability::constant &&
-                vd.causality != variable_causality::input;
+        auto filter = [this](const variable_type& vt) {
+            return [this, &vt](const value_reference& vr, const std::variant<double, int, bool, std::string>&) {
+                const auto& vd = this->find_variable_description(vr, vt);
+                /// FMI Specification 2.0.4 - Section 4.2.4
+                return vd.variability != variable_variability::constant &&
+                    vd.causality != variable_causality::input;
+            };
         };
-
-        const auto [realRefs, realValues] = realSetCache_.modify_and_get(deltaT, filter);
-        const auto [integerRefs, integerValues] = integerSetCache_.modify_and_get(deltaT, filter);
-        const auto [booleanRefs, booleanValues] = booleanSetCache_.modify_and_get(deltaT, filter);
-        const auto [stringRefs, stringValues] = stringSetCache_.modify_and_get(deltaT, filter);
+        
+        const auto [realRefs, realValues] = realSetCache_.modify_and_get(deltaT, filter(variable_type::real));
+        const auto [integerRefs, integerValues] = integerSetCache_.modify_and_get(deltaT, filter(variable_type::integer));
+        const auto [booleanRefs, booleanValues] = booleanSetCache_.modify_and_get(deltaT, filter(variable_type::boolean));
+        const auto [stringRefs, stringValues] = stringSetCache_.modify_and_get(deltaT, filter(variable_type::string));
 
         slave_->set_variables(
             gsl::make_span(realRefs),