diff --git a/System/Clock.hsc b/System/Clock.hsc
--- a/System/Clock.hsc
+++ b/System/Clock.hsc
@@ -4,6 +4,9 @@
 --   <http://www.opengroup.org/onlinepubs/9699919799/functions/clock_getres.html#>
 
 {-# OPTIONS_GHC -fno-warn-type-defaults #-}
+-- To allow importing Data.Int and Data.Word indiscriminately on all platforms,
+-- since we can't systematically predict what typedef's expand to.
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
 
 module System.Clock
   ( Clock(..)
@@ -16,6 +19,7 @@
 
 import Control.Applicative ((<$>), (<*>))
 import Data.Int
+import Data.Word
 import Data.Typeable (Typeable)
 import Foreign.Ptr
 import Foreign.Storable
@@ -189,7 +193,7 @@
           -- seconds
           (fromInteger $ xsi * ysi)
           -- nanoseconds
-          (fromInteger $ (xni * yni + (xni * ysi + xsi * yni) * (10^9)) 
+          (fromInteger $ (xni * yni + (xni * ysi + xsi * yni) * (10^9))
             `div` (10^9))
   negate (TimeSpec xs xn) =
       normalize $ TimeSpec (negate xs) (negate xn)
diff --git a/clock.cabal b/clock.cabal
--- a/clock.cabal
+++ b/clock.cabal
@@ -1,5 +1,5 @@
 name:          clock
-version:       0.5.0.1
+version:       0.5.1
 stability:     stable
 synopsis:      High-resolution clock functions: monotonic, realtime, cputime.
 description:   A package for convenient access to high-resolution clock and
@@ -30,7 +30,7 @@
                .
                * @PackagingOnly@ changes are made for quality assurance reasons.
 
-copyright:     Copyright © Cetin Sert 2009-2013, Eugene Kirpichov 2010, Finn Espen Gundersen 2013, Gerolf Seitz 2013, Mathieu Boespflug 2014, Chris Done 2015, Dimitri Sabadie 2015, Christian Burger 2015
+copyright:     Copyright © Cetin Sert 2009-2013, Eugene Kirpichov 2010, Finn Espen Gundersen 2013, Gerolf Seitz 2013, Mathieu Boespflug 2014 2015, Chris Done 2015, Dimitri Sabadie 2015, Christian Burger 2015
 license:       BSD3
 license-file:  LICENSE
 author:        Cetin Sert <cetin@corsis.eu>, Corsis Research