diff --git a/Duckling/Volume/RO/Corpus.hs b/Duckling/Volume/RO/Corpus.hs
index 3e136ddb6..2b0a4f374 100644
--- a/Duckling/Volume/RO/Corpus.hs
+++ b/Duckling/Volume/RO/Corpus.hs
@@ -9,7 +9,8 @@
 {-# LANGUAGE OverloadedStrings #-}
 
 module Duckling.Volume.RO.Corpus
-  ( corpus ) where
+  ( corpus
+  ) where
 
 import Data.String
 import Prelude
@@ -26,8 +27,10 @@ allExamples :: [Example]
 allExamples = concat
   [ examples (VolumeValue Millilitre 250)
              [ "250 mililitri"
+             , "250 de mililitri"
              , "250ml"
              , "250 ml"
+             , "250 de ml"
              ]
   , examples (VolumeValue Litre 2)
              [ "2 litri"
@@ -45,4 +48,7 @@ allExamples = concat
              [ "jumatate de litru"
              , "jumătate de litru"
              ]
+  , examples (VolumeValue Gallon 20)
+             [ "douazeci de galoane"
+             ]
   ]
diff --git a/Duckling/Volume/RO/Rules.hs b/Duckling/Volume/RO/Rules.hs
index 012814a8a..4b63aa3b5 100644
--- a/Duckling/Volume/RO/Rules.hs
+++ b/Duckling/Volume/RO/Rules.hs
@@ -7,13 +7,15 @@
 
 
 {-# LANGUAGE GADTs #-}
+{-# LANGUAGE LambdaCase #-}
 {-# LANGUAGE OverloadedStrings #-}
 
 module Duckling.Volume.RO.Rules
-  ( rules ) where
+  ( rules
+  ) where
 
-import Prelude
 import Data.String
+import Prelude
 
 import Duckling.Dimensions.Types
 import Duckling.Types
@@ -25,9 +27,9 @@ ruleLatentVolMl = Rule
   { name = "<latent vol> ml"
   , pattern =
     [ dimension Volume
-    , regex "m(ililitr[ui]|l)"
+    , regex "(de )?m(ililitr[ui]|l)"
     ]
-  , prod = \tokens -> case tokens of
+  , prod = \case
       (Token Volume vd:_) ->
         Just . Token Volume $ withUnit TVolume.Millilitre vd
       _ -> Nothing
@@ -38,9 +40,9 @@ ruleVolHectoliters = Rule
   { name = "<vol> hectoliters"
   , pattern =
     [ dimension Volume
-    , regex "hectolitr[ui]"
+    , regex "(de )?hectolitr[ui]"
     ]
-  , prod = \tokens -> case tokens of
+  , prod = \case
       (Token Volume vd:_) ->
         Just . Token Volume $ withUnit TVolume.Hectolitre vd
       _ -> Nothing
@@ -51,9 +53,9 @@ ruleVolLiters = Rule
   { name = "<vol> liters"
   , pattern =
     [ dimension Volume
-    , regex "l(itr[ui])?"
+    , regex "(de )?l(itr[ui])?"
     ]
-  , prod = \tokens -> case tokens of
+  , prod = \case
       (Token Volume vd:_) ->
         Just . Token Volume $ withUnit TVolume.Litre vd
       _ -> Nothing
@@ -65,7 +67,7 @@ ruleHalfLiter = Rule
   , pattern =
     [ regex "jum(a|ă)tate de litr[ui]"
     ]
-  , prod = \_ -> Just . Token Volume . withUnit TVolume.Litre $ volume 0.5
+  , prod = const . Just . Token Volume . withUnit TVolume.Litre $ volume 0.5
   }
 
 ruleLatentVolGalon :: Rule
@@ -73,9 +75,9 @@ ruleLatentVolGalon = Rule
   { name = "<latent vol> galon"
   , pattern =
     [ dimension Volume
-    , regex "gal(oane|on)?"
+    , regex "(de )?gal(oane|on)?"
     ]
-  , prod = \tokens -> case tokens of
+  , prod = \case
       (Token Volume vd:_) ->
         Just . Token Volume $ withUnit TVolume.Gallon vd
       _ -> Nothing