diff --git a/yesod-default/Yesod/Default/Main.hs b/yesod-default/Yesod/Default/Main.hs
index b2e158a0..e24e63f0 100644
--- a/yesod-default/Yesod/Default/Main.hs
+++ b/yesod-default/Yesod/Default/Main.hs
@@ -7,7 +7,7 @@ module Yesod.Default.Main
     ) where
 
 import Yesod.Default.Config
-import Yesod.Logger (Logger, defaultDevelopmentLogger, logString, flushLogger)
+import Yesod.Logger (Logger, defaultDevelopmentLogger, logString)
 import Network.Wai (Application)
 import Network.Wai.Handler.Warp
     (runSettings, defaultSettings, settingsPort, settingsHost)
@@ -82,20 +82,15 @@ defaultRunner f app = do
 
 -- | Run your development app using a custom environment type and loader
 --   function
---
---   > withDevelAppPort :: Dynamic
---   > withDevelAppPort = toDyn $ defaultDevelApp customLoadAppConfig withMySite
---
 defaultDevelApp
     :: (Show env, Read env)
     => IO (AppConfig env extra) -- ^ A means to load your development @'AppConfig'@
     -> (AppConfig env extra -> Logger -> IO Application) -- ^ Get your @Application@
-    -> ((Int, Application) -> IO ()) -> IO ()
-defaultDevelApp load getApp f = do
+    -> IO (Int, Application)
+defaultDevelApp load getApp = do
     conf   <- load
     logger <- defaultDevelopmentLogger
     let p = appPort conf
     logString logger $ "Devel application launched, listening on port " ++ show p
     app <- getApp conf logger
-    f (p, app)
-    flushLogger logger
+    return (p, app)
diff --git a/yesod/Devel.hs b/yesod/Devel.hs
index 1e6d5651..e3dddcae 100644
--- a/yesod/Devel.hs
+++ b/yesod/Devel.hs
@@ -159,11 +159,9 @@ showPkgName = (\(D.PackageName n) -> n) . D.pkgName
 develFile :: D.PackageId -> T.Text
 develFile pid = [ST|
 {-# LANGUAGE PackageImports #-}
-import "#{showPkgName pid}" Application (withDevelAppPort)
-import Data.Dynamic (fromDynamic)
+import "#{showPkgName pid}" Application (getApplicationDev)
 import Network.Wai.Handler.Warp
     (runSettings, defaultSettings, settingsPort, settingsHost)
-import Data.Maybe (fromJust)
 import Control.Concurrent (forkIO)
 import System.Directory (doesFileExist, removeFile)
 import System.Exit (exitSuccess)
@@ -171,13 +169,13 @@ import Control.Concurrent (threadDelay)
 
 main :: IO ()
 main = do
-  putStrLn "Starting devel application"
-  wdap <- (return . fromJust . fromDynamic) withDevelAppPort
-  forkIO . wdap $ \(port, app) -> runSettings defaultSettings
-    { settingsPort = port
-    , settingsHost = "0.0.0.0"
-    } app
-  loop
+    putStrLn "Starting devel application"
+    (port, app) <- getApplicationDev
+    forkIO $ runSettings defaultSettings
+        { settingsPort = port
+        , settingsHost = "0.0.0.0"
+        } app
+    loop
 
 loop :: IO ()
 loop = do
diff --git a/yesod/scaffold/Application.hs.cg b/yesod/scaffold/Application.hs.cg
index e66ff96f..0d419e8f 100644
--- a/yesod/scaffold/Application.hs.cg
+++ b/yesod/scaffold/Application.hs.cg
@@ -1,7 +1,7 @@
 {-# OPTIONS_GHC -fno-warn-orphans #-}
 module Application
     ( getApplication
-    , withDevelAppPort
+    , getApplicationDev
     ) where
 
 import Import
@@ -11,7 +11,6 @@ import Yesod.Auth
 import Yesod.Default.Config
 import Yesod.Default.Main
 import Yesod.Default.Handlers
-import Data.Dynamic (Dynamic, toDyn)
 #if DEVELOPMENT
 import Yesod.Logger (Logger, logBS)
 import Network.Wai.Middleware.RequestLogger (logHandleDev)
@@ -55,9 +54,9 @@ getApplication conf logger = do
 #endif
 
 -- for yesod devel
-withDevelAppPort :: Dynamic
-withDevelAppPort =
-    toDyn $ defaultDevelApp loader getApplication
+getApplicationDev :: IO (Int, Application)
+getApplicationDev =
+    defaultDevelApp loader getApplication
   where
     loader = loadConfig (configSettings Development)
         { csParseExtra = parseExtra
diff --git a/yesod/scaffold/tiny/Application.hs.cg b/yesod/scaffold/tiny/Application.hs.cg
index 6bc3ef07..e8e4dcc9 100644
--- a/yesod/scaffold/tiny/Application.hs.cg
+++ b/yesod/scaffold/tiny/Application.hs.cg
@@ -1,7 +1,7 @@
 {-# OPTIONS_GHC -fno-warn-orphans #-}
 module Application
     ( getApplication
-    , withDevelAppPort
+    , getApplicationDev
     ) where
 
 import Import
@@ -18,7 +18,6 @@ import Yesod.Logger (Logger, logBS, toProduction)
 import Network.Wai.Middleware.RequestLogger (logHandle)
 #endif
 import Network.Wai (Application)
-import Data.Dynamic (Dynamic, toDyn)
 
 -- Import all relevant handler modules here.
 import Handler.Root
@@ -48,9 +47,9 @@ getApplication conf logger = do
 #endif
 
 -- for yesod devel
-withDevelAppPort :: Dynamic
-withDevelAppPort =
-    toDyn $ defaultDevelApp loader getApplication
+getApplicationDev :: IO (Int, Application)
+getApplicationDev =
+    defaultDevelApp loader getApplication
   where
     loader = loadConfig (configSettings Development)
         { csParseExtra = parseExtra