diff --git a/test/models/airplane.hpp b/test/models/airplane.hpp
index 84d7ccd..621877d 100644
--- a/test/models/airplane.hpp
+++ b/test/models/airplane.hpp
@@ -16,17 +16,19 @@ struct airplane {
     unsigned int id{};
     std::string brand;
     std::string model;
-
-    template<class Operator>
-    void process(Operator &op) {
-        namespace field = matador::access;
-        using namespace matador::utils;
-        field::primary_key(op, "id", id);
-        field::attribute(op, "brand", brand, 255);
-        field::attribute(op, "model", model, 255);
-    }
 };
 
 }
 
+namespace matador::access {
+template<class Operator>
+void process(Operator &op, test::airplane &object) {
+    namespace field = matador::access;
+    using namespace matador::utils;
+    field::primary_key(op, "id", object.id);
+    field::attribute(op, "brand", object.brand, 255);
+    field::attribute(op, "model", object.model, 255);
+}
+
+}
 #endif //QUERY_AIRPLANE_HPP