diff --git a/CHANGELOG.markdown b/CHANGELOG.markdown
--- a/CHANGELOG.markdown
+++ b/CHANGELOG.markdown
@@ -1,3 +1,7 @@
+0.1.3
+-----
+* Added support for GHC 7.8's `bitSizeMaybe`
+
 0.1
 ---
 * Repository Initialized moving `Numeric.Natural` from `semigroups` 0.8.6
diff --git a/LICENSE b/LICENSE
--- a/LICENSE
+++ b/LICENSE
@@ -1,4 +1,4 @@
-Copyright 2011 Edward Kmett
+Copyright 2011-2014 Edward Kmett
 
 All rights reserved.
 
diff --git a/nats.cabal b/nats.cabal
--- a/nats.cabal
+++ b/nats.cabal
@@ -1,6 +1,6 @@
 name:          nats
 category:      Numeric, Algebra
-version:       0.1.2
+version:       0.1.3
 license:       BSD3
 cabal-version: >= 1.8
 license-file:  LICENSE
@@ -9,10 +9,9 @@
 stability:     provisional
 homepage:      http://github.com/ekmett/nats/
 bug-reports:   http://github.com/ekmett/nats/issues
-copyright:     Copyright (C) 2011-2013 Edward A. Kmett
-synopsis:      Haskell 98 natural numbers
-description:
-    Haskell 98 natural numbers
+copyright:     Copyright (C) 2011-2014 Edward A. Kmett
+synopsis:      Natural numbers
+description:   Natural numbers
 build-type:    Simple
 extra-source-files:
   .ghci
diff --git a/src/Numeric/Natural/Internal.hs b/src/Numeric/Natural/Internal.hs
--- a/src/Numeric/Natural/Internal.hs
+++ b/src/Numeric/Natural/Internal.hs
@@ -9,7 +9,7 @@
 -----------------------------------------------------------------------------
 -- |
 -- Module      :  Numeric.Natural.Internal
--- Copyright   :  (C) 2011 Edward Kmett,
+-- Copyright   :  (C) 2011-2014 Edward Kmett,
 -- License     :  BSD-style (see the file LICENSE)
 --
 -- Maintainer  :  Edward Kmett <ekmett@gmail.com>
@@ -95,7 +95,11 @@
   {-# INLINE complementBit #-}
   testBit = testBit . runNatural
   {-# INLINE testBit #-}
-  bitSize = bitSize . runNatural
+#if defined(__GLASGOW_HASKELL__) && __GLASGOW_HASKELL__ >= 707
+  bitSizeMaybe _ = Nothing
+  {-# INLINE bitSizeMaybe #-}
+#endif
+  bitSize = error "Natural: bitSize"
   {-# INLINE bitSize #-}
   isSigned _ = False
   {-# INLINE isSigned #-}