diff --git a/yesod-core/Yesod/Dispatch.hs b/yesod-core/Yesod/Dispatch.hs
index e9ce2811..1851e0c7 100644
--- a/yesod-core/Yesod/Dispatch.hs
+++ b/yesod-core/Yesod/Dispatch.hs
@@ -89,8 +89,8 @@ mkYesodDataGeneral name clazzes isSub res = do
     let (name':rest) = words name
     (x, _) <- mkYesodGeneral name' rest clazzes isSub res
     let rname = mkName $ "resources" ++ name
-    eres <- [|fmap parseType $(lift res)|]
-    let y = [ SigD rname $ ListT `AppT` ConT ''Resource
+    eres <- lift res
+    let y = [ SigD rname $ ListT `AppT` (ConT ''Resource `AppT` ConT ''String)
             , FunD rname [Clause [] (NormalB eres) []]
             ]
     return $ x ++ y
diff --git a/yesod-core/test/YesodCoreTest/Media.hs b/yesod-core/test/YesodCoreTest/Media.hs
index 43033785..0b7e4190 100644
--- a/yesod-core/test/YesodCoreTest/Media.hs
+++ b/yesod-core/test/YesodCoreTest/Media.hs
@@ -1,6 +1,7 @@
 {-# LANGUAGE QuasiQuotes, TypeFamilies, TemplateHaskell, MultiParamTypeClasses #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE FlexibleInstances #-}
+{-# OPTIONS_GHC -fno-warn-orphans #-}
 module YesodCoreTest.Media (mediaTest, Widget) where
 
 import Test.Hspec
@@ -9,12 +10,9 @@ import Yesod.Core hiding (Request)
 import Network.Wai
 import Network.Wai.Test
 import Text.Lucius
+import YesodCoreTest.MediaData
 
-data Y = Y
-mkYesod "Y" [parseRoutes|
-/ RootR GET
-/static StaticR GET
-|]
+mkYesodDispatch "Y" resourcesY
 
 instance Yesod Y where
     approot _ = ""
diff --git a/yesod-core/test/YesodCoreTest/MediaData.hs b/yesod-core/test/YesodCoreTest/MediaData.hs
new file mode 100644
index 00000000..6a33fab3
--- /dev/null
+++ b/yesod-core/test/YesodCoreTest/MediaData.hs
@@ -0,0 +1,12 @@
+{-# LANGUAGE QuasiQuotes, TypeFamilies, TemplateHaskell, MultiParamTypeClasses #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE FlexibleInstances #-}
+module YesodCoreTest.MediaData where
+
+import Yesod.Core
+
+data Y = Y
+mkYesodData "Y" [parseRoutes|
+/ RootR GET
+/static StaticR GET
+|]
diff --git a/yesod-core/yesod-core.cabal b/yesod-core/yesod-core.cabal
index dd9dad4e..f7f94152 100644
--- a/yesod-core/yesod-core.cabal
+++ b/yesod-core/yesod-core.cabal
@@ -18,6 +18,7 @@ extra-source-files:
   test/en.msg
   test/YesodCoreTest/NoOverloadedStrings.hs
   test/YesodCoreTest/Media.hs
+  test/YesodCoreTest/MediaData.hs
   test/YesodCoreTest/Exceptions.hs
   test/YesodCoreTest/Widget.hs
   test/YesodCoreTest/CleanPath.hs
diff --git a/yesod-static/Yesod/Static.hs b/yesod-static/Yesod/Static.hs
index 549e91af..ceb4833f 100644
--- a/yesod-static/Yesod/Static.hs
+++ b/yesod-static/Yesod/Static.hs
@@ -40,6 +40,7 @@ module Yesod.Static
     , staticFilesList
     , publicFiles
       -- * Hashing
+    , base64md5
 #ifdef TEST
     , getFileListPieces
 #endif
@@ -57,11 +58,12 @@ import Data.List (intercalate)
 import Language.Haskell.TH
 import Language.Haskell.TH.Syntax
 
-import Crypto.Conduit (hashFile)
+import Crypto.Conduit (hashFile, sinkHash)
 import Crypto.Hash.MD5 (MD5)
 
 import qualified Data.ByteString.Base64
 import qualified Data.ByteString.Char8 as S8
+import qualified Data.ByteString.Lazy as L
 import qualified Data.Serialize
 import Data.Text (Text, pack)
 import Data.Monoid (mempty)
@@ -74,6 +76,9 @@ import qualified Data.ByteString as S
 import Network.HTTP.Types (status301)
 import System.PosixCompat.Files (getFileStatus, modificationTime)
 import System.Posix.Types (EpochTime)
+import Data.Conduit (($$), runResourceT)
+import Data.Conduit.List (sourceList)
+import Control.Monad.ST (runST)
 
 import Network.Wai.Application.Static
     ( StaticSettings (..)
@@ -315,6 +320,14 @@ base64md5File :: Prelude.FilePath -> IO String
 base64md5File = fmap (base64 . encode) . hashFile
     where encode d = Data.Serialize.encode (d :: MD5)
 
+base64md5 :: L.ByteString -> String
+base64md5 lbs =
+            base64 $ encode
+          $ runST $ runResourceT
+          $ sourceList (L.toChunks lbs) $$ sinkHash
+  where
+    encode d = Data.Serialize.encode (d :: MD5)
+
 base64 :: S.ByteString -> String
 base64 = map tr
        . take 8