fix old build

2015-04-05 11:17:52 +01:00 · 2015-04-05 11:17:52 +01:00 · ed4da5734b
commit ed4da5734b
parent e74448aeb4
1 changed files with 2 additions and 0 deletions
--- a/Crypto/Internal/Compat.hs
+++ b/Crypto/Internal/Compat.hs
@ -15,7 +15,9 @@ module Crypto.Internal.Compat
    ) where

 import System.IO.Unsafe
+#if MIN_VERSION_base(4,5,0)
 import Data.Bits (popCount)
+#endif

 -- | perform io for hashes that do allocation and ffi.
 -- unsafeDupablePerformIO is used when possible as the