diff --git a/yesod-core/Yesod/Core.hs b/yesod-core/Yesod/Core.hs
index 8a1c0dd2..e9e4b4bc 100644
--- a/yesod-core/Yesod/Core.hs
+++ b/yesod-core/Yesod/Core.hs
@@ -52,7 +52,7 @@ module Yesod.Core
     ) where
 
 import Yesod.Internal.Core
-import Yesod.Internal
+import Yesod.Internal (Header(..))
 import Yesod.Content
 import Yesod.Dispatch
 import Yesod.Handler
diff --git a/yesod-core/Yesod/Internal/Core.hs b/yesod-core/Yesod/Internal/Core.hs
index ec0b9141..809bd8ce 100644
--- a/yesod-core/Yesod/Internal/Core.hs
+++ b/yesod-core/Yesod/Internal/Core.hs
@@ -26,6 +26,7 @@ module Yesod.Internal.Core
     , fileLocationToString
     , messageLoggerHandler
       -- * Sessions
+    , Session
     , SessionBackend (..)
     , defaultClientSessionBackend
     , clientSessionBackend