diff --git a/diff3.cabal b/diff3.cabal
--- a/diff3.cabal
+++ b/diff3.cabal
@@ -1,5 +1,5 @@
 name:                diff3
-version:             0.3.0
+version:             0.3.1
 synopsis:            Perform a 3-way difference of documents
 homepage:            http://github.com/ocharles/diff3.git
 license:             BSD3
@@ -11,7 +11,6 @@
 cabal-version:       >=1.8
 bug-reports: http://github.com/ocharles/diff3/issues
 copyright: Copyright (C) 2012 Oliver Charles
-synopsis:            Perform a 3-way difference of documents
 
 source-repository head
   type: git
diff --git a/src/Data/Algorithm/Diff3.hs b/src/Data/Algorithm/Diff3.hs
--- a/src/Data/Algorithm/Diff3.hs
+++ b/src/Data/Algorithm/Diff3.hs
@@ -1,6 +1,7 @@
 {-| An implementation of a 3-way merge algorithm. -}
 module Data.Algorithm.Diff3 (Hunk(..), diff3, merge) where
 
+import Prelude hiding ((<>))
 import Data.Algorithm.Diff
 import Data.Monoid (Monoid, mempty, mappend)