1 files changed, 2 insertions, 2 deletions

diff --git a/lib/Numeric/GSL/Differentiation.hs b/lib/Numeric/GSL/Differentiation.hs
index ab5eb50..448ab63 100644
--- a/lib/Numeric/GSL/Differentiation.hs
+++ b/lib/Numeric/GSL/Differentiation.hs
@@ -48,7 +48,7 @@ derivGen c h f x = unsafePerformIO $ do
     freeHaskellFunPtr fp
     return result
 
-foreign import ccall "gsl-aux.h deriv" 
+foreign import ccall unsafe "gsl-aux.h deriv" 
  c_deriv :: CInt -> FunPtr (Double -> Ptr () -> Double) -> Double -> Double 
                     -> Ptr Double -> Ptr Double -> IO CInt
 
@@ -84,4 +84,4 @@ derivBackward = derivGen 2
 
 {- | conversion of Haskell functions into function pointers that can be used in the C side
 -}
-foreign import ccall "wrapper" mkfun:: (Double -> Ptr() -> Double) -> IO( FunPtr (Double -> Ptr() -> Double)) 
+foreign import ccall unsafe "wrapper" mkfun:: (Double -> Ptr() -> Double) -> IO( FunPtr (Double -> Ptr() -> Double))