diff --git a/LambdaCalculator.cabal b/LambdaCalculator.cabal
--- a/LambdaCalculator.cabal
+++ b/LambdaCalculator.cabal
@@ -1,5 +1,5 @@
 name:           LambdaCalculator
-version:        0.1
+version:        0.2
 license:        BSD3
 license-file:   LICENSE
 copyright:      Tim Sheard
@@ -11,7 +11,7 @@
 stability:      stable
 build-type:     Simple
 cabal-version:  >= 1.2
-tested-with:    GHC == 7.6.1
+tested-with:    GHC == 7.10.3
 
 Executable LambdaCalculator
   Main-is: LambdaCalculator.hs
diff --git a/LambdaCalculator.hs b/LambdaCalculator.hs
--- a/LambdaCalculator.hs
+++ b/LambdaCalculator.hs
@@ -66,13 +66,16 @@
         church 0 s z = z
         church n s z = App s (church (n-1) s z)
 
+parse1 :: Parser a -> String -> Either ParseError a
 parse1 x s = parse (whiteSpace >> x) "keyboard input" s
 
+parse2 :: Parser Exp -> String -> Exp
 parse2 x s =
   case parse1 x s of
-   Right(ans) -> ans
+   Right ans    -> ans
    Left message -> error (show message)
 
+pe :: String -> Exp
 pe = parse2 pExp
 
 ------------------------------------------------
@@ -201,7 +204,7 @@
 command str =
   case parse1 pCom str of
     Right(x) -> x
-    Left s -> Fail (show s)
+    Left s   -> Fail (show s)
 
 ------------------------------------------------------