diff --git a/common/include/serial.h b/common/include/serial.h
index 70b329b24..fa77c1456 100644
--- a/common/include/serial.h
+++ b/common/include/serial.h
@@ -483,7 +483,7 @@ public:
 };
 
 template <typename T>
-class class_type : public message_type<decltype(udt_to_message(std::forward<T>(*static_cast<T*>(nullptr))))>
+class class_type : public message_type<decltype(udt_to_message(std::declval<T>()))>
 {
 };