1 files changed, 4 insertions, 2 deletions

diff --git a/lib/Numeric/GSL/ODE.hs b/lib/Numeric/GSL/ODE.hs
index 912e8a8..ea064d6 100644
--- a/lib/Numeric/GSL/ODE.hs
+++ b/lib/Numeric/GSL/ODE.hs
@@ -33,10 +33,12 @@ module Numeric.GSL.ODE (
 ) where
 
 import Data.Packed.Internal
-import Foreign
-import Foreign.C.Types(CInt)
 import Numeric.GSL.Internal
 
+import Foreign.Ptr(FunPtr, nullFunPtr, freeHaskellFunPtr)
+import Foreign.C.Types(CInt)
+import System.IO.Unsafe(unsafePerformIO)
+
 -------------------------------------------------------------------------
 
 -- | Stepping functions