Fixed build against newer libraries.

1 files changed, 4 insertions, 2 deletions

diff --git a/Presence/ByteStringOperators.hs b/Presence/ByteStringOperators.hs
index 9e6cc938..4453aca0 100644
--- a/Presence/ByteStringOperators.hs
+++ b/Presence/ByteStringOperators.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE CPP #-}
 module ByteStringOperators where
 
 import qualified Data.ByteString as S (ByteString)
@@ -41,8 +42,9 @@ bshow :: Show a => a -> ByteString
 bshow = L.pack . show
 
 
+#if MIN_VERSION_bytestring(0,10,0)
+#else
 instance NFData L.ByteString where
     rnf L.Empty       = ()
     rnf (L.Chunk _ b) = rnf b
-
-
+#endif