diff --git a/Crypto/Hash/Types.hs b/Crypto/Hash/Types.hs
index 85baf56..165a3c0 100644
--- a/Crypto/Hash/Types.hs
+++ b/Crypto/Hash/Types.hs
@@ -17,7 +17,6 @@ module Crypto.Hash.Types
 import           Crypto.Internal.Imports
 import           Crypto.Internal.ByteArray (ByteArrayAccess, Bytes)
 import qualified Crypto.Internal.ByteArray as B
-import           Data.Word
 import           Foreign.Ptr (Ptr)
 
 -- | Class representing hashing algorithms.