diff --git a/Browse.hs b/Browse.hs
index b5fd130..2b376b3 100644
--- a/Browse.hs
+++ b/Browse.hs
@@ -27,7 +27,7 @@ getSyntax opt mname  = do
     hPutStrLn inp ":set prompt \"Prelude>\""
     hPutStrLn inp ":quit"
     cs <- hGetContents out
-    return $ unlines $ dropTailer $ dropHeader $ lines $ cs
+    return . unlines . dropTailer . dropHeader . lines $ cs
   where
     isNotPrefixOf x y = not (x `isPrefixOf` y)
     dropHeader xs = tail $ dropWhile (isNotPrefixOf "Prelude>") xs
@@ -53,7 +53,7 @@ preprocess cs = case parse remove "remove" cs of
                   Left  e -> error $ show e
 
 modName :: Parser String
-modName = (:) <$> (oneOf ['A'..'Z'])
+modName = (:) <$> oneOf ['A'..'Z']
               <*> (many . oneOf $ ['A'..'Z'] ++ ['a'..'z'] ++ ['0'..'9'] ++ "_'#")
 
 anyName :: Parser String
@@ -102,8 +102,8 @@ identifiers (Module _ _ _ _ _ _ x) = filter hid $ concatMap decl x
 
 decl :: Decl -> [String]
 decl (TypeSig _ [x] _) = [name x]
-decl (DataDecl _ _ _ x _ y _) = name x : (map qualConDecl y)
-decl (ClassDecl _ _ x _ _ y) = name x : (map classDecl y)
+decl (DataDecl _ _ _ x _ y _) = name x : map qualConDecl y
+decl (ClassDecl _ _ x _ _ y)  = name x : map classDecl y
 decl (TypeDecl _ x _ _) = [name x]
 decl x = [show x]
 
diff --git a/Check.hs b/Check.hs
index 7ea831d..5d7ba52 100644
--- a/Check.hs
+++ b/Check.hs
@@ -37,7 +37,7 @@ unfoldLines (x:xs) = x ++ unfold xs
     unfold [] = "\n"
     unfold (l:ls)
       | isAlpha (head l)           = ('\n':l) ++ unfold ls
-      | otherwise                  = (drop 4 l) ++ "\0" ++ unfold ls
+      | otherwise                  = drop 4 l ++ "\0" ++ unfold ls
 
 ----------------------------------------------------------------
 
diff --git a/GHCMod.hs b/GHCMod.hs
index 70684e7..5a7451c 100644
--- a/GHCMod.hs
+++ b/GHCMod.hs
@@ -32,19 +32,19 @@ defaultOptions = Options { convert = toPlain
                          }
 
 argspec :: [OptDescr (Options -> Options)]
-argspec = [ Option ['l'] ["tolisp"]
+argspec = [ Option "l" ["tolisp"]
             (NoArg (\opts -> opts { convert = toLisp }))
             "print as a list of Lisp"
-          , Option ['g'] ["ghc"]
+          , Option "g" ["ghc"]
             (ReqArg (\str opts -> opts { ghc = str }) "ghc")
             "GHC path"
-          , Option ['i'] ["ghci"]
+          , Option "i" ["ghci"]
             (ReqArg (\str opts -> opts { ghci = str }) "ghci")
             "ghci path"
-          , Option ['p'] ["ghc-pkg"]
+          , Option "p" ["ghc-pkg"]
             (ReqArg (\str opts -> opts { ghcPkg = str }) "ghc-pkg")
             "ghc-pkg path"
-          , Option ['o'] ["output-dir"]
+          , Option "o" ["output-dir"]
             (ReqArg (\str opts -> opts { outDir = str }) "dist/flymake")
             "output directory"
           ]
@@ -61,7 +61,7 @@ main :: IO ()
 main = flip catch handler $ do
     args <- getArgs
     let (opt,cmdArg) = parseArgs argspec args
-    res <- case cmdArg !! 0 of
+    res <- case head cmdArg of
       "browse" -> browseModule opt (cmdArg !! 1)
       "list"   -> listModules opt
       "check"  -> checkSyntax opt (cmdArg !! 1)