diff --git a/src/PDF.hs b/src/PDF.hs
index da23597..5e06c0d 100644
--- a/src/PDF.hs
+++ b/src/PDF.hs
@@ -2,7 +2,10 @@
 {-# LANGUAGE FlexibleInstances #-}
 {-# LANGUAGE MultiParamTypeClasses #-}
 module PDF (
-      Document(..)
+      AllLayers(..)
+    , Document(..)
+    , EOLStyleK(..)
+    , UnifiedLayers(..)
     , parseDocument
     , render
   ) where
diff --git a/src/PDF/Layer.hs b/src/PDF/Layer.hs
index 7b57129..8405e25 100644
--- a/src/PDF/Layer.hs
+++ b/src/PDF/Layer.hs
@@ -2,7 +2,8 @@
 {-# LANGUAGE FlexibleInstances #-}
 {-# LANGUAGE MultiParamTypeClasses #-}
 module PDF.Layer (
-      Layer(..)
+      AllObjects(..)
+    , Layer(..)
     , unify
   ) where