1 files changed, 3 insertions, 2 deletions

diff --git a/packages/glpk/lib/Numeric/LinearProgramming.hs b/packages/glpk/lib/Numeric/LinearProgramming.hs
index f0709c3..c8cb0e1 100644
--- a/packages/glpk/lib/Numeric/LinearProgramming.hs
+++ b/packages/glpk/lib/Numeric/LinearProgramming.hs
@@ -69,8 +69,9 @@ module Numeric.LinearProgramming(
 
 import Numeric.LinearAlgebra hiding (i)
 import Data.Packed.Development
-import Foreign(Ptr,unsafePerformIO)
-import Foreign.C.Types(CInt)
+import Foreign(Ptr)
+import System.IO.Unsafe(unsafePerformIO)
+import Foreign.C.Types(CInt(..))
 import Data.List((\\),sortBy,nub)
 import Data.Function(on)