diff --git a/lib/typus/orm/base/class_methods.rb b/lib/typus/orm/base/class_methods.rb
index a36eff633..4c49e6f70 100644
--- a/lib/typus/orm/base/class_methods.rb
+++ b/lib/typus/orm/base/class_methods.rb
@@ -175,7 +175,7 @@ def custom_attribute?(field)
         end
 
         def virtual_fields
-          instance_methods.map(&:to_s) - model_fields.keys.map(&:to_s)
+          (instance_methods - model_fields.keys).map(&:to_s)
         end
 
       end