diff --git a/Yesod/Form/MassInput.hs b/Yesod/Form/MassInput.hs
--- a/Yesod/Form/MassInput.hs
+++ b/Yesod/Form/MassInput.hs
@@ -11,7 +11,7 @@
 
 import Yesod.Form.Types
 import Yesod.Form.Functions
-import Yesod.Form.Fields (boolField)
+import Yesod.Form.Fields (checkBoxField)
 import Yesod.Core
 import Control.Monad.Trans.RWS (get, put, ask)
 import Data.Maybe (fromMaybe)
@@ -97,7 +97,7 @@
 <input type=hidden name=#{deleteName} value=yes>
 |]
         _ -> do
-            (_, xml2) <- aFormToForm $ areq boolField FieldSettings
+            (_, xml2) <- aFormToForm $ areq checkBoxField FieldSettings
                 { fsLabel = SomeMessage MsgDelete
                 , fsTooltip = Nothing
                 , fsName = Just deleteName
diff --git a/Yesod/Form/Types.hs b/Yesod/Form/Types.hs
--- a/Yesod/Form/Types.hs
+++ b/Yesod/Form/Types.hs
@@ -102,7 +102,7 @@
     (AForm f) <*> (AForm g) = AForm $ \mr env ints -> do
         (a, b, ints', c) <- f mr env ints
         (x, y, ints'', z) <- g mr env ints'
-        return (a <*> x, b `mappend` y, ints'', c `mappend` z)
+        return (a <*> x, b . y, ints'', c `mappend` z)
 instance (Monad m, Monoid a) => Monoid (AForm m a) where
     mempty = pure mempty
     mappend a b = mappend <$> a <*> b
diff --git a/yesod-form.cabal b/yesod-form.cabal
--- a/yesod-form.cabal
+++ b/yesod-form.cabal
@@ -1,5 +1,5 @@
 name:            yesod-form
-version:         1.3.5
+version:         1.3.5.1
 license:         MIT
 license-file:    LICENSE
 author:          Michael Snoyman <michael@snoyman.com>