diff --git a/src/js_realm_object.hpp b/src/js_realm_object.hpp
index 16ce879b..d9c0bbde 100644
--- a/src/js_realm_object.hpp
+++ b/src/js_realm_object.hpp
@@ -52,10 +52,6 @@ class RealmObject {
 
 template<typename T>
 struct RealmObjectClass : ClassDefinition<T, realm::Object> {
-    using ContextType = typename T::Context;
-    using ObjectType = typename T::Object;
-    using ValueType = typename T::Value;
-    using ReturnValue = js::ReturnValue<T>;
     using RealmObject = js::RealmObject<T>;
 
     const std::string name = "RealmObject";