diff --git a/Ganeti/HTools/Types.hs b/Ganeti/HTools/Types.hs
index 104bf64..8146870 100644
--- a/Ganeti/HTools/Types.hs
+++ b/Ganeti/HTools/Types.hs
@@ -65,2 +65,4 @@ import qualified Data.Map as M
 import qualified Text.JSON as JSON
+import Control.Applicative
+import Control.Monad
 
@@ -221,2 +223,9 @@ data Result a
 
+instance Functor Result where
+    fmap  = liftM
+
+instance Applicative Result where
+    pure  = return
+    (<*>) = ap  -- defined in Control.Monad
+
 instance Monad Result where
@@ -252,2 +261,9 @@ data OpResult a = OpFail FailMode -- ^ Failed operation
 
+instance Functor OpResult where
+    fmap  = liftM
+
+instance Applicative OpResult where
+    pure  = return
+    (<*>) = ap  -- defined in Control.Monad
+
 instance Monad OpResult where