diff --git a/src/Random/Xorshift/Int32.hs b/src/Random/Xorshift/Int32.hs
--- a/src/Random/Xorshift/Int32.hs
+++ b/src/Random/Xorshift/Int32.hs
@@ -43,7 +43,6 @@
 instance RandomGen Xorshift32 where
   next a = (fromIntegral c, b) where
     b@(Xorshift32 c) = step32 a
-  split  = error "Splitting of an Xorshift random generator is not implemented."
   genRange a = (fromEnum (minBound `asTypeOf` a),
                 fromEnum (maxBound `asTypeOf` a))
 
diff --git a/src/Random/Xorshift/Int64.hs b/src/Random/Xorshift/Int64.hs
--- a/src/Random/Xorshift/Int64.hs
+++ b/src/Random/Xorshift/Int64.hs
@@ -43,7 +43,6 @@
 instance RandomGen Xorshift64 where
   next a = (fromIntegral c, b) where
     b@(Xorshift64 c) = step64 a
-  split  = error "Splitting of an Xorshift random generator is not implemented."
   genRange a = (fromEnum (minBound `asTypeOf` a),
                 fromEnum (maxBound `asTypeOf` a))
 
diff --git a/xorshift.cabal b/xorshift.cabal
--- a/xorshift.cabal
+++ b/xorshift.cabal
@@ -1,5 +1,5 @@
 name: xorshift
-version: 2
+version: 2.0.1
 Cabal-Version: >= 1.6
 build-type: Simple
 
@@ -42,4 +42,4 @@
 source-repository this
   type:     git
   location: git://github.com/fuzxxl/Xorshift.git
-  tag:      release-2
+  tag:      release-2.0.1