fix build with old ghc

diff --git a/Utility/MagicWormhole.hs b/Utility/MagicWormhole.hs
index 3743f352cef6559b7f5730f7243c64f2122d5c4d..6d2df81e2eb42d19dc15f4fc509f0c1f7d7b6d5b 100644 (file)
--- a/Utility/MagicWormhole.hs
+++ b/Utility/MagicWormhole.hs
@@ -36,6 +36,8 @@ import Control.Concurrent
 import Control.Exception
 import Data.Char
 import Data.List
+import Control.Applicative
+import Prelude
 
 -- | A Magic Wormhole code.
 newtype Code = Code String