diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,3 +1,7 @@
+### 0.26.12
+
++ Add support for the .gir format dialect generated by vala.
+
 ### 0.26.11
 
 + Don't try to guess which callback arguments are `user_data` arguments, as this can lead to problems, as in [issue 447](https://github.com/haskell-gi/haskell-gi/issues/447).
diff --git a/haskell-gi.cabal b/haskell-gi.cabal
--- a/haskell-gi.cabal
+++ b/haskell-gi.cabal
@@ -1,5 +1,5 @@
 name:                haskell-gi
-version:             0.26.11
+version:             0.26.12
 synopsis:            Generate Haskell bindings for GObject Introspection capable libraries
 description:         Generate Haskell bindings for GObject Introspection capable libraries. This includes most notably
                      Gtk+, but many other libraries in the GObject ecosystem provide introspection data too.
diff --git a/lib/Data/GI/GIR/Arg.hs b/lib/Data/GI/GIR/Arg.hs
--- a/lib/Data/GI/GIR/Arg.hs
+++ b/lib/Data/GI/GIR/Arg.hs
@@ -4,6 +4,7 @@
     , Scope(..)
     , parseArg
     , parseTransfer
+    , parseTransferString
     ) where
 
 #if !MIN_VERSION_base(4,11,0)
@@ -44,12 +45,15 @@
         transfer :: Transfer
     } deriving (Show, Eq, Ord)
 
-parseTransfer :: Parser Transfer
-parseTransfer = getAttr "transfer-ownership" >>= \case
+parseTransferString :: Text -> Parser Transfer
+parseTransferString transfer = case transfer of
                 "none" -> return TransferNothing
                 "container" -> return TransferContainer
                 "full" -> return TransferEverything
                 t -> parseError $ "Unknown transfer type \"" <> t <> "\""
+
+parseTransfer :: Parser Transfer
+parseTransfer = getAttr "transfer-ownership" >>= parseTransferString
 
 parseScope :: Text -> Parser Scope
 parseScope "call" = return ScopeTypeCall
diff --git a/lib/Data/GI/GIR/Constant.hs b/lib/Data/GI/GIR/Constant.hs
--- a/lib/Data/GI/GIR/Constant.hs
+++ b/lib/Data/GI/GIR/Constant.hs
@@ -7,7 +7,7 @@
 import Data.Text (Text)
 
 import Data.GI.GIR.BasicTypes (Type)
-import Data.GI.GIR.Type (parseType, parseCType)
+import Data.GI.GIR.Type (parseType)
 import Data.GI.GIR.Parser
 
 -- | Info about a constant.
@@ -26,7 +26,12 @@
   deprecated <- parseDeprecation
   value <- getAttr "value"
   t <- parseType
-  ctype <- parseCType
+  -- This contains the C name for the constant. The C gir generator
+  -- call this "c:type", while the vala gir generator calls it
+  -- "c:identifier", so try both.
+  ctype <- queryAttrWithNamespace CGIRNS "type" >>= \case
+    Just i -> return i
+    Nothing -> getAttrWithNamespace CGIRNS "identifier"
   doc <- parseDocumentation
   return (name, Constant { constantType = t
                          , constantValue = value
diff --git a/lib/Data/GI/GIR/Property.hs b/lib/Data/GI/GIR/Property.hs
--- a/lib/Data/GI/GIR/Property.hs
+++ b/lib/Data/GI/GIR/Property.hs
@@ -9,8 +9,8 @@
 import Data.Monoid ((<>))
 #endif
 
-import Data.GI.GIR.Arg (parseTransfer)
-import Data.GI.GIR.BasicTypes (Transfer, Type)
+import Data.GI.GIR.Arg (parseTransferString)
+import Data.GI.GIR.BasicTypes (Transfer(..), Type)
 import Data.GI.GIR.Parser
 import Data.GI.GIR.Type (parseType)
 
@@ -35,7 +35,7 @@
 parseProperty = do
   name <- getAttr "name"
   t <- parseType
-  transfer <- parseTransfer
+  transfer <- optionalAttr "transfer-ownership" TransferNothing parseTransferString
   deprecated <- parseDeprecation
   readable <- optionalAttr "readable" True parseBool
   writable <- optionalAttr "writable" False parseBool