diff --git a/CHANGELOG.markdown b/CHANGELOG.markdown
--- a/CHANGELOG.markdown
+++ b/CHANGELOG.markdown
@@ -1,3 +1,7 @@
+1.0.1.1
+-----
+* Build correctly on GHC-7.0 (#14)
+
 1.0.1
 -----
 * Improve the performance of Data.ByteString.Lazy.UTF8.fromString. (Thanks, ndmitchell)
diff --git a/Data/ByteString/Lazy/UTF8.hs b/Data/ByteString/Lazy/UTF8.hs
--- a/Data/ByteString/Lazy/UTF8.hs
+++ b/Data/ByteString/Lazy/UTF8.hs
@@ -46,10 +46,15 @@
 import qualified Data.ByteString.Lazy as B
 import qualified Data.ByteString.Lazy.Internal as B
 import qualified Data.ByteString.Internal as S
-import System.IO.Unsafe
 import Prelude hiding (take,drop,splitAt,span,break,foldr,foldl,length,lines)
 
 import Codec.Binary.UTF8.Generic (buncons)
+
+#if MIN_VERSION_base(4,4,0)
+import System.IO.Unsafe (unsafeDupablePerformIO)
+#else
+import GHC.IO (unsafeDupablePerformIO)
+#endif
 
 ---------------------------------------------------------------------
 -- ENCODING
diff --git a/utf8-string.cabal b/utf8-string.cabal
--- a/utf8-string.cabal
+++ b/utf8-string.cabal
@@ -1,5 +1,5 @@
 Name:               utf8-string
-Version:            1.0.1
+Version:            1.0.1.1
 Author:             Eric Mertens
 Maintainer:         emertens@galois.com
 License:            BSD3
@@ -14,6 +14,7 @@
 Build-type:         Simple
 cabal-version:      >= 1.2
 Extra-Source-Files: CHANGELOG.markdown
+Tested-With:        GHC==7.0.4, GHC==7.4.2, GHC==7.6.3, GHC==7.8.4, GHC==7.10.2
 
 library
   Ghc-options:        -W -O2