diff --git a/box-tuples.cabal b/box-tuples.cabal
--- a/box-tuples.cabal
+++ b/box-tuples.cabal
@@ -2,7 +2,7 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                box-tuples
-version:             0.2.0.2
+version:             0.2.0.3
 synopsis:            A hack to use GHC.Prim primitives in GHCi
 description:         As of now, the GHCi interactive runtime is incapable of working on unboxed
                      tuples. In particular, it is unable to fully apply any function returning an
diff --git a/src/Data/Tuple/Unboxed/Rep.hs b/src/Data/Tuple/Unboxed/Rep.hs
--- a/src/Data/Tuple/Unboxed/Rep.hs
+++ b/src/Data/Tuple/Unboxed/Rep.hs
@@ -1,6 +1,6 @@
 {-# LANGUAGE UnboxedTuples, MagicHash, CPP #-}
 #if __GLASGOW_HASKELL__ >= 800
-{-# LANGUAGE TypeInType, RankNTypes, MultiParamTypeClasses, FlexibleInstances #-}
+{-# LANGUAGE TypeInType, StarIsType, RankNTypes, MultiParamTypeClasses, FlexibleInstances #-}
 {-# OPTIONS_GHC -fobject-code #-}
 
 -------------------------------------------------------------------------------
@@ -27,6 +27,7 @@
   , RepCompose4(..)
   ) where
 
+import Data.Kind
 import GHC.Prim
 import GHC.Exts