diff --git a/System/Random/MWC/Distributions.hs b/System/Random/MWC/Distributions.hs
--- a/System/Random/MWC/Distributions.hs
+++ b/System/Random/MWC/Distributions.hs
@@ -1,4 +1,4 @@
-{-# LANGUAGE BangPatterns #-}
+{-# LANGUAGE BangPatterns, GADTs #-}
 -- |
 -- Module    : System.Random.MWC.Distributions
 -- Copyright : (c) 2012 Bryan O'Sullivan
diff --git a/benchmarks/tsts.hs b/benchmarks/tsts.hs
deleted file mode 100644
--- a/benchmarks/tsts.hs
+++ /dev/null
@@ -1,65 +0,0 @@
-{-# LANGUAGE BangPatterns #-}
-import Control.Monad
-import System.Random.MWC
-import System.Random.MWC.Distributions
-
-main = do
-  withSystemRandom $ \g -> replicateM_ (300*1000) $ do
-    --
-    !n <- normal 0 1  g
-    !n <- normal 0 2  g
-    !n <- normal 3 3  g
-    !n <- normal 2 4  g
-    !n <- normal 2 5  g
-    !n <- normal 1 6  g
-    !n <- normal 3 7  g
-    !n <- normal 3 8  g
-    !n <- normal 3 9  g
-    !n <- normal 3 10 g
-    --
-    !n <- normal 0 1  g
-    !n <- normal 0 2  g
-    !n <- normal 3 3  g
-    !n <- normal 2 4  g
-    !n <- normal 2 5  g
-    !n <- normal 1 6  g
-    !n <- normal 3 7  g
-    !n <- normal 3 8  g
-    !n <- normal 3 9  g
-    !n <- normal 3 10 g
-    --
-    !n <- normal 0 1  g
-    !n <- normal 0 2  g
-    !n <- normal 3 3  g
-    !n <- normal 2 4  g
-    !n <- normal 2 5  g
-    !n <- normal 1 6  g
-    !n <- normal 3 7  g
-    !n <- normal 3 8  g
-    !n <- normal 3 9  g
-    !n <- normal 3 10 g
-    --
-    !n <- normal 0 1  g
-    !n <- normal 0 2  g
-    !n <- normal 3 3  g
-    !n <- normal 2 4  g
-    !n <- normal 2 5  g
-    !n <- normal 1 6  g
-    !n <- normal 3 7  g
-    !n <- normal 3 8  g
-    !n <- normal 3 9  g
-    !n <- normal 3 10 g
-    --
-    !n <- normal 0 1  g
-    !n <- normal 0 2  g
-    !n <- normal 3 3  g
-    !n <- normal 2 4  g
-    !n <- normal 2 5  g
-    !n <- normal 1 6  g
-    !n <- normal 3 7  g
-    !n <- normal 3 8  g
-    !n <- normal 3 9  g
-    !n <- normal 3 10 g
-    --
-    return () :: IO ()
-    
diff --git a/mwc-random.cabal b/mwc-random.cabal
--- a/mwc-random.cabal
+++ b/mwc-random.cabal
@@ -1,5 +1,5 @@
 name:           mwc-random
-version:        0.13.1.1
+version:        0.13.1.2
 synopsis:       Fast, high quality pseudo random number generation
 description:
   This package contains code for generating high quality random