1 files changed, 4 insertions, 2 deletions

diff --git a/lib/Numeric/GSL/Root.hs b/lib/Numeric/GSL/Root.hs
index ddb090d..784bbd4 100644
--- a/lib/Numeric/GSL/Root.hs
+++ b/lib/Numeric/GSL/Root.hs
@@ -51,10 +51,12 @@ module Numeric.GSL.Root (
 
 import Data.Packed.Internal
 import Data.Packed.Matrix
-import Foreign
-import Foreign.C.Types(CInt)
 import Numeric.GSL.Internal
 
+import  Foreign.Ptr(FunPtr, freeHaskellFunPtr)
+import Foreign.C.Types(CInt)
+import System.IO.Unsafe(unsafePerformIO)
+
 -------------------------------------------------------------------------
 
 data RootMethod = Hybrids