diff --git a/pugs-compat/src/Pugs/Compat/Posix.hs b/pugs-compat/src/Pugs/Compat/Posix.hs
index 3dac3a1..0e91184 100644
--- a/pugs-compat/src/Pugs/Compat/Posix.hs
+++ b/pugs-compat/src/Pugs/Compat/Posix.hs
@@ -131,6 +131,7 @@ import qualified Control.Exception
 import Debug.Trace
 import qualified System.Environment
 import System.Directory (getCurrentDirectory, setCurrentDirectory, doesFileExist, doesDirectoryExist)
+import IO
 import System.IO
 import System.Exit
 import Foreign.C.String