1 files changed, 4 insertions, 0 deletions

diff --git a/Compat.hs b/Compat.hs
index 43f62c0..3b77851 100644
--- a/Compat.hs
+++ b/Compat.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE CPP #-}
 module Compat where
 
 import Data.Bits
@@ -7,6 +8,8 @@ import Data.ASN1.Encoding
 import Data.ASN1.BinaryEncoding
 import Crypto.PubKey.RSA as RSA
 
+#if defined(VERSION_cryptonite)
+
 instance ASN1Object PublicKey where
     toASN1 pubKey = \xs -> Start Sequence
                          : IntVal (public_n pubKey)
@@ -38,6 +41,7 @@ instance ASN1Object PublicKey where
     fromASN1 _ =
         Left "fromASN1: RSA.PublicKey: unexpected format"
 
+#endif
 
 toPositive :: Integer -> Integer
 toPositive int