diff --git a/deferred-folds.cabal b/deferred-folds.cabal
--- a/deferred-folds.cabal
+++ b/deferred-folds.cabal
@@ -1,7 +1,7 @@
 name:
   deferred-folds
 version:
-  0.6.4
+  0.6.5
 category:
   Folding
 synopsis:
diff --git a/library/DeferredFolds/Unfold.hs b/library/DeferredFolds/Unfold.hs
--- a/library/DeferredFolds/Unfold.hs
+++ b/library/DeferredFolds/Unfold.hs
@@ -110,6 +110,9 @@
 instance Eq a => Eq (Unfold a) where
   (==) left right = toList left == toList right
 
+instance Show a => Show (Unfold a) where
+  show = show . toList
+
 {-| Apply a Gonzalez fold -}
 {-# INLINE fold #-}
 fold :: Fold input output -> Unfold input -> output
diff --git a/library/DeferredFolds/UnfoldM.hs b/library/DeferredFolds/UnfoldM.hs
--- a/library/DeferredFolds/UnfoldM.hs
+++ b/library/DeferredFolds/UnfoldM.hs
@@ -62,6 +62,9 @@
 instance Eq a => Eq (UnfoldM Identity a) where
   (==) left right = toList left == toList right
 
+instance Show a => Show (UnfoldM Identity a) where
+  show = show . toList
+
 {-| Perform a monadic strict left fold -}
 {-# INLINE foldlM' #-}
 foldlM' :: Monad m => (output -> input -> m output) -> output -> UnfoldM m input -> m output