1 files changed, 4 insertions, 2 deletions

diff --git a/lib/Numeric/GSL/Fitting.hs b/lib/Numeric/GSL/Fitting.hs
index e5aa528..337dc6a 100644
--- a/lib/Numeric/GSL/Fitting.hs
+++ b/lib/Numeric/GSL/Fitting.hs
@@ -51,10 +51,12 @@ module Numeric.GSL.Fitting (
 
 import Data.Packed.Internal
 import Numeric.LinearAlgebra
-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 FittingMethod = LevenbergMarquardtScaled -- ^ Interface to gsl_multifit_fdfsolver_lmsder. This is a robust and efficient version of the Levenberg-Marquardt algorithm as implemented in the scaled lmder routine in minpack. Minpack was written by Jorge J. More, Burton S. Garbow and Kenneth E. Hillstrom.