diff --git a/example/calculator-aserver.cpp b/example/calculator-aserver.cpp
index 290e0aa..149da86 100644
--- a/example/calculator-aserver.cpp
+++ b/example/calculator-aserver.cpp
@@ -15,17 +15,23 @@
 
     auto get_property(last_result_t) const
     {
-        return 42;
+        return _last_result;
     }
 
-    bool set_property(last_result_t, auto)
+    bool set_property(last_result_t, int64_t v)
     {
+        if (v % 2 == 0)
+        {
+            std::swap(_last_result, v);
+            return v != _last_result;
+        }
         return false;
     }
 
   private:
     auto startup() -> sdbusplus::async::task<>
     {
+        last_result(123);
         ctx.get_bus().request_name("net.poettering.Calculator");
 
         status(State::Error);
diff --git a/tools/sdbusplus/templates/interface.aserver.hpp.mako b/tools/sdbusplus/templates/interface.aserver.hpp.mako
index 2f1189e..f94ba3b 100644
--- a/tools/sdbusplus/templates/interface.aserver.hpp.mako
+++ b/tools/sdbusplus/templates/interface.aserver.hpp.mako
@@ -80,6 +80,11 @@
 ${p.render(loader, "property.aserver.set.hpp.mako", property=p, interface=interface)}
 % endfor
 
+  protected:
+% for p in interface.properties:
+${p.render(loader, "property.aserver.value.hpp.mako", property=p, interface=interface)}\
+% endfor
+
   private:
     /** @return the async context */
     sdbusplus::async::context& _context()
@@ -91,10 +96,6 @@
         _${interface.joinedName("_", "interface")};
 
 % for p in interface.properties:
-${p.render(loader, "property.aserver.value.hpp.mako", property=p, interface=interface)}\
-% endfor
-
-% for p in interface.properties:
 ${p.render(loader, "property.aserver.typeid.hpp.mako", property=p, interface=interface)}\
 % endfor
 % for s in interface.signals: