diff --git a/Crypto/PubKey/Curve25519.hs b/Crypto/PubKey/Curve25519.hs
index f1d46ca..e50bb21 100644
--- a/Crypto/PubKey/Curve25519.hs
+++ b/Crypto/PubKey/Curve25519.hs
@@ -26,6 +26,7 @@ import           Control.Applicative
 import           Data.Bits
 import           Data.Byteable
 import           Data.ByteString (ByteString)
+import qualified Data.ByteString as B ()
 import qualified Data.ByteString.Internal as B
 import           Data.SecureMem
 import           Data.Word