1 files changed, 5 insertions, 1 deletions

diff --git a/lib/Numeric/GSL/Polynomials.hs b/lib/Numeric/GSL/Polynomials.hs
index 9885920..b21b1b6 100644
--- a/lib/Numeric/GSL/Polynomials.hs
+++ b/lib/Numeric/GSL/Polynomials.hs
@@ -1,4 +1,4 @@
-{-# LANGUAGE ForeignFunctionInterface #-}
+{-# LANGUAGE CPP, ForeignFunctionInterface #-}
 -----------------------------------------------------------------------------
 {- |
 Module      :  Numeric.GSL.Polynomials
@@ -23,6 +23,10 @@ import Data.Packed.Internal
 import Data.Complex
 import System.IO.Unsafe (unsafePerformIO)
 
+#if __GLASGOW_HASKELL__ >= 704
+import Foreign.C.Types (CInt(..))
+#endif
+
 {- | Solution of general polynomial equations, using /gsl_poly_complex_solve/. For example,
      the three solutions of x^3 + 8 = 0