diff --git a/functor-combo.cabal b/functor-combo.cabal
--- a/functor-combo.cabal
+++ b/functor-combo.cabal
@@ -1,5 +1,5 @@
 Name:                functor-combo
-Version:             0.3.4
+Version:             0.3.5
 Cabal-Version:       >= 1.6
 Synopsis:            Functor combinators with tries & zippers
 Category:            Data
diff --git a/src/FunctorCombo/Functor.hs b/src/FunctorCombo/Functor.hs
--- a/src/FunctorCombo/Functor.hs
+++ b/src/FunctorCombo/Functor.hs
@@ -1,6 +1,6 @@
 {-# LANGUAGE TypeOperators, EmptyDataDecls, StandaloneDeriving #-}
 {-# LANGUAGE DeriveFunctor, DeriveFoldable, DeriveTraversable #-}
-{-# LANGUAGE TypeFamilies #-}
+{-# LANGUAGE TypeFamilies, CPP #-}
 
 {-# OPTIONS_GHC -Wall #-}
 {-# OPTIONS_GHC -fno-warn-orphans #-}
@@ -112,8 +112,10 @@
 -- TODO: replace explicit definition with deriving, when the compiler fix
 -- has been around for a while.
 
+#if !MIN_VERSION_base(4,7,0)
 deriving instance Foldable    (Const b)
 deriving instance Traversable (Const b)
+#endif
 
 -- instance Foldable (Const b) where
 --   -- fold (Const _) = mempty