diff --git a/examples/persistent-template-classy-example.hs b/examples/persistent-template-classy-example.hs
--- a/examples/persistent-template-classy-example.hs
+++ b/examples/persistent-template-classy-example.hs
@@ -10,6 +10,10 @@
 {-# LANGUAGE FunctionalDependencies #-}
 {-# LANGUAGE TypeSynonymInstances #-}
 {-# LANGUAGE FlexibleInstances #-}
+{-# LANGUAGE DerivingStrategies #-}     
+{-# LANGUAGE StandaloneDeriving #-}     
+{-# LANGUAGE UndecidableInstances #-}   
+{-# LANGUAGE DataKinds #-}              
 
 import Control.Lens (Lens', (^.), lens)
 import Control.Monad.IO.Class (liftIO)
diff --git a/persistent-template-classy.cabal b/persistent-template-classy.cabal
--- a/persistent-template-classy.cabal
+++ b/persistent-template-classy.cabal
@@ -1,13 +1,13 @@
 cabal-version: 1.12
 
--- This file has been generated from package.yaml by hpack version 0.31.0.
+-- This file has been generated from package.yaml by hpack version 0.33.0.
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: d42bdbd3c8dfe95a357a1c7edcc09b82bbce5cadb2c494dbbe9ed7d54be8d645
+-- hash: 9530d91ec1ba694ed49be0da24eba33680900e20636130fa90bace81d6b05979
 
 name:           persistent-template-classy
-version:        0.1.0.1
+version:        0.2.0
 synopsis:       Generate classy lens field accessors for persistent models
 description:    Generate classy lens field accessors for persistent models.
 category:       Database, Lens, Yesod
diff --git a/src/Database/Persist/TH/Classy.hs b/src/Database/Persist/TH/Classy.hs
--- a/src/Database/Persist/TH/Classy.hs
+++ b/src/Database/Persist/TH/Classy.hs
@@ -99,7 +99,7 @@
                     Nothing -> tname
                     Just t -> t <> "." <> tname
                   nonMaybe = ConT (mkName (T.unpack tnameAndModule))
-               in case "Maybe" `elem` fieldAttrs of
+               in case FieldAttrMaybe `elem` fieldAttrs of
                     False -> nonMaybe
                     True -> AppT (ConT (mkName "Maybe")) nonMaybe
         return $