diff --git a/Data/Bson.hs b/Data/Bson.hs
index d12b600..7f59b10 100644
--- a/Data/Bson.hs
+++ b/Data/Bson.hs
@@ -29,7 +29,7 @@ import Prelude hiding (fail, lookup)
 #if !MIN_VERSION_base(4,8,0)
 import Control.Applicative ((<$>))
 #endif
-#if !MIN_VERSION_base(4,13,0)
+#if MIN_VERSION_base(4, 9, 0)
 import Control.Monad.Fail (MonadFail(fail))
 #endif
 import Control.Monad (foldM)