diff --git a/lib/fast_jsonapi/serialization_core.rb b/lib/fast_jsonapi/serialization_core.rb
index a50c17f..7da75c8 100644
--- a/lib/fast_jsonapi/serialization_core.rb
+++ b/lib/fast_jsonapi/serialization_core.rb
@@ -13,7 +13,6 @@ module FastJsonapi
                       :record_type,
                       :cache_length,
                       :cached
-                      :record_type
       end
     end