diff --git a/Crypto/PubKey/HashDescr.hs b/Crypto/PubKey/HashDescr.hs
index e170b2b..c5f79a6 100644
--- a/Crypto/PubKey/HashDescr.hs
+++ b/Crypto/PubKey/HashDescr.hs
@@ -24,6 +24,7 @@ module Crypto.PubKey.HashDescr
     , hashDescrRIPEMD160
     ) where
 
+import           Data.ByteString.Char8 ()
 import           Data.ByteString (ByteString)
 import qualified Data.ByteString as B
 import           Crypto.Hash