diff --git a/src/Model/Types/Avs.hs b/src/Model/Types/Avs.hs
index 997fa6588..3aa3da59e 100644
--- a/src/Model/Types/Avs.hs
+++ b/src/Model/Types/Avs.hs
@@ -44,7 +44,7 @@ o .:?~ key = o .: key <|> maybe empty parseJSON go
 
 
 -- Like (.:?) but maps Just null to Nothing, ie. Nothing instead of Just ""
-(.:?!) :: (Canonical (Maybe a), FromJSON a) => Object -> Text -> Parser (Maybe a)
+(.:?!) :: (Canonical (Maybe a), FromJSON a) => Object -> Data.Aeson.Types.Key -> Parser (Maybe a)
 (.:?!) o k = canonical <$> (o .:? k)