Hello, I am getting what is to me a mysterious error in a test case that I am writing: vigalchin@ubuntu:~/FTP/Haskell/unix-2.2.0.0/tests/timer$ runhaskell Setup.lhs build Preprocessing executables for Test-1.0... Building Test-1.0... [1 of 1] Compiling Main ( ./timer.hs, dist/build/timer/timer-tmp/Main.o ) ./timer.hs:11:45: Not in scope: data constructor `FunPtr' It seems like the compiler is complaining about the lack of FunPtr in it's symbol table but System.Posix is imported: module Main where import System.Posix import Foreign import Foreign.C import Foreign.Ptr main = do let event = Sigevent{sigevFunction=(FunPtr (notifyFunc))} <<<<<< error here timerId <- timerCreate Clock_Realtime Nothing timerDelete timerId return () notifyFunc :: Sigval -> IO () notifyFunc sigval = do putStrLn "timer POP!!!!!!!" return () I am probably looking right at the answer and not seeing it. ?? Thanks, Vasili