diff --git a/Yesod/Persist/Core.hs b/Yesod/Persist/Core.hs
--- a/Yesod/Persist/Core.hs
+++ b/Yesod/Persist/Core.hs
@@ -81,7 +81,7 @@
 --
 -- Since 1.2.0
 defaultGetDBRunner :: YesodPersistBackend site ~ SQL.SqlBackend
-                   => (site -> Pool SQL.Connection)
+                   => (site -> Pool SQL.SqlBackend)
                    -> HandlerT site IO (DBRunner site, HandlerT site IO ())
 defaultGetDBRunner getPool = do
     pool <- fmap getPool getYesod
diff --git a/yesod-persistent.cabal b/yesod-persistent.cabal
--- a/yesod-persistent.cabal
+++ b/yesod-persistent.cabal
@@ -1,5 +1,5 @@
 name:            yesod-persistent
-version:         1.4.0.3
+version:         1.4.0.4
 license:         MIT
 license-file:    LICENSE
 author:          Michael Snoyman <michael@snoyman.com>