diff --git a/lib/base/type.cpp b/lib/base/type.cpp
index 93ae1b9bd..a26d8cf9b 100644
--- a/lib/base/type.cpp
+++ b/lib/base/type.cpp
@@ -88,6 +88,16 @@ void Type::SetPrototype(const Object::Ptr& object)
 	m_Prototype = object;
 }
 
+void Type::SetField(int id, const Value& value)
+{
+	if (id == 0) {
+		SetPrototype(value);
+		return;
+	}
+
+	Object::SetField(id, value);
+}
+
 Value Type::GetField(int id) const
 {
 	if (id == 0)
diff --git a/lib/base/type.hpp b/lib/base/type.hpp
index 30fd671a5..f1b006daf 100644
--- a/lib/base/type.hpp
+++ b/lib/base/type.hpp
@@ -81,6 +81,7 @@ public:
 	static void Register(const Type::Ptr& type);
 	static Type::Ptr GetByName(const String& name);
 
+	virtual void SetField(int id, const Value& value);
 	virtual Value GetField(int id) const;
 
 protected: