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diff --git a/src/Hakyll/Core/Writable/WritableTuple.hs b/src/Hakyll/Core/Writable/WritableTuple.hs
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+++ b/src/Hakyll/Core/Writable/WritableTuple.hs
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+-- | This module exposes a writable type 'WritableTuple' which is a simple
+-- newtype wrapper around a tuple.
+--
+-- The idea is that, given a tuple @(a, b)@, @a@ is the value you actually want
+-- to save to the disk, and @b@ is some additional info that you /don't/ want to
+-- save, but that you need later, for example in a 'require' clause.
+--
+{-# LANGUAGE GeneralizedNewtypeDeriving, DeriveDataTypeable #-}
+module Hakyll.Core.Writable.WritableTuple
+    ( WritableTuple (..)
+    , writableTupleFst
+    , writableTupleSnd
+    , writableTupleCompiler
+    ) where
+
+import Control.Arrow (arr)
+
+import Data.Typeable (Typeable)
+import Data.Binary (Binary)
+
+import Hakyll.Core.Writable
+import Hakyll.Core.Compiler
+
+newtype WritableTuple a b = WritableTuple {unWritableTuple :: (a, b)}
+                          deriving (Show, Eq, Ord, Binary, Typeable)
+
+instance Writable a => Writable (WritableTuple a b) where
+    write dst (WritableTuple (x, _)) = write dst x
+
+writableTupleFst :: WritableTuple a b -> a
+writableTupleFst = fst . unWritableTuple
+
+writableTupleSnd :: WritableTuple a b -> b
+writableTupleSnd = snd . unWritableTuple
+
+writableTupleCompiler :: Compiler (a, b) (WritableTuple a b)
+writableTupleCompiler = arr WritableTuple