diff --git a/lib/seed-fu-mongoid/document_seeder.rb b/lib/seed-fu-mongoid/document_seeder.rb
index efd7026..58dfec3 100644
--- a/lib/seed-fu-mongoid/document_seeder.rb
+++ b/lib/seed-fu-mongoid/document_seeder.rb
@@ -71,7 +71,7 @@ module SeedFuMongoid
 
       def seed!
         data.each do |key, value|
-          document[key] = value
+          document.send :"#{key}=", value
         end
 
         puts "#{@klass.name} #{document.attributes}"