diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,3 +1,7 @@
+## 2.5.0.1
+
+* workaround TH bug in GHC 7.10
+
 ## 2.5
 
 * read/write typeclass split
diff --git a/Database/Persist/TH.hs b/Database/Persist/TH.hs
--- a/Database/Persist/TH.hs
+++ b/Database/Persist/TH.hs
@@ -81,6 +81,14 @@
 import GHC.Generics (Generic)
 import qualified Data.Text.Encoding as TE
 
+-- | This special-cases "type_" and strips out its underscore. When
+-- used for JSON serialization and deserialization, it works around
+-- <https://github.com/yesodweb/persistent/issues/412>
+unHaskellNameForJSON :: HaskellName -> Text
+unHaskellNameForJSON = fixTypeUnderscore . unHaskellName
+  where fixTypeUnderscore "type_" = "type"
+        fixTypeUnderscore name = name
+
 -- | Converts a quasi-quoted syntax into a list of entity definitions, to be
 -- used as input to the template haskell generation code (mkPersist).
 persistWith :: PersistSettings -> QuasiQuoter
@@ -1534,7 +1542,7 @@
             (objectE `AppE` ListE pairs)
         pairs = zipWith toPair (entityFields def) xs
         toPair f x = InfixE
-            (Just (packE `AppE` LitE (StringL $ unpack $ unHaskellName $ fieldHaskell f)))
+            (Just (packE `AppE` LitE (StringL $ unpack $ unHaskellNameForJSON $ fieldHaskell f)))
             dotEqualE
             (Just $ VarE x)
         fromJSONI = typeInstanceD ''FromJSON (mpsGeneric mps) typ [parseJSON']
@@ -1551,7 +1559,7 @@
         toPull f = InfixE
             (Just $ VarE obj)
             (if maybeNullable f then dotColonQE else dotColonE)
-            (Just $ AppE packE $ LitE $ StringL $ unpack $ unHaskellName $ fieldHaskell f)
+            (Just $ AppE packE $ LitE $ StringL $ unpack $ unHaskellNameForJSON $ fieldHaskell f)
     case mpsEntityJSON mps of
         Nothing -> return [toJSONI, fromJSONI]
         Just entityJSON -> do
diff --git a/persistent-template.cabal b/persistent-template.cabal
--- a/persistent-template.cabal
+++ b/persistent-template.cabal
@@ -1,5 +1,5 @@
 name:            persistent-template
-version:         2.5.1
+version:         2.5.1.1
 license:         MIT
 license-file:    LICENSE
 author:          Michael Snoyman <michael@snoyman.com>