diff --git a/src/PostgREST/ApiRequest.hs b/src/PostgREST/ApiRequest.hs
index e9e290d65..05bae221c 100644
--- a/src/PostgREST/ApiRequest.hs
+++ b/src/PostgREST/ApiRequest.hs
@@ -39,7 +39,8 @@ import           PostgREST.Types           ( QualifiedIdentifier (..)
                                            , ContentType(..)
                                            , ApiRequestError(..)
                                            , toMime
-                                           , operators)
+                                           , operators
+                                           , FtsMode(..))
 import           Data.Ranged.Ranges        (Range(..), rangeIntersection, emptyRange)
 import qualified Data.CaseInsensitive      as CI
 import           Web.Cookie                (parseCookiesText)
@@ -141,8 +142,16 @@ userApiRequest schema req reqBody
       ActionInvoke{isReadOnly=True} -> partition (liftM2 (||) (isEmbedPath . fst) (hasOperator . snd)) flts
       _ -> (flts, [])
   flts = [ (toS k, toS $ fromJust v) | (k,v) <- qParams, isJust v, k /= "select", not (endingIn ["order", "limit", "offset", "and", "or"] k) ]
-  hasOperator val = foldr ((||) . flip T.isPrefixOf val) False $ (<> ".") <$> M.keys operators
+  hasOperator val = foldr ((||) . flip T.isPrefixOf val) False ((<> ".") <$> (M.keys operators ++ ["not", show Plain, show Phrase]))
+                    || hasLanguageFts val
   isEmbedPath = T.isInfixOf "."
+  -- handle "?tsv=english.fts.possible" case
+  hasLanguageFts val = case T.splitOn "." val of
+    [_, "fts", _] -> True
+    [_, "fts"]    -> True
+    [_, "@@", _]  -> True -- TODO: '@@' deprecated
+    [_, "@@"]     -> True
+    _             -> False
   isTargetingProc = fromMaybe False $ (== "rpc") <$> listToMaybe path
   payload =
     case decodeContentType . fromMaybe "application/json" $ lookupHeader "content-type" of
diff --git a/src/PostgREST/Parsers.hs b/src/PostgREST/Parsers.hs
index dfbbe1b7a..d27522dfc 100644
--- a/src/PostgREST/Parsers.hs
+++ b/src/PostgREST/Parsers.hs
@@ -147,8 +147,8 @@ pOpExpr pSVal pLVal = try ( string "not" *> pDelimiter *> (OpExpr True <$> pOper
       <?> "operator (eq, gt, ...)"
     pFts = do
       mode <- option Normal $
-              try (string "phrase" *> pDelimiter *> pure Phrase)
-          <|> try (string "plain" *> pDelimiter *> pure Plain)
+              try (string (show Phrase) *> pDelimiter *> pure Phrase)
+          <|> try (string (show Plain) *> pDelimiter *> pure Plain)
 
       lang <- try (Just <$> manyTill (letter <|> digit <|> oneOf "_") (try (string ".fts") <|> try (string ".@@")) <* pDelimiter) -- TODO: '@@' deprecated
           <|> try (string "fts" *> pDelimiter) *> pure Nothing
diff --git a/src/PostgREST/Types.hs b/src/PostgREST/Types.hs
index df56a7234..3e9efd3cf 100644
--- a/src/PostgREST/Types.hs
+++ b/src/PostgREST/Types.hs
@@ -179,8 +179,13 @@ data Operation = Op Operator SingleVal |
                  Fts FtsMode (Maybe Language) SingleVal |
                  Join QualifiedIdentifier ForeignKey deriving (Eq, Show)
 
-data FtsMode = Normal | Plain | Phrase deriving (Eq, Show)
+data FtsMode =  Normal | Plain | Phrase deriving Eq
+instance Show FtsMode where
+  show Normal = mzero
+  show Plain  = "plain"
+  show Phrase = "phrase"
 type Language = Text
+
 -- | Represents a single value in a filter, e.g. id=eq.singleval
 type SingleVal = Text
 -- | Represents a list value in a filter, e.g. id=in.(val1,val2,val3)
diff --git a/test/Feature/RpcSpec.hs b/test/Feature/RpcSpec.hs
index 517527d71..43712c7d1 100644
--- a/test/Feature/RpcSpec.hs
+++ b/test/Feature/RpcSpec.hs
@@ -286,3 +286,38 @@ spec =
         get "/rpc/get_projects_below?id=5&id=gt.2&select=id" `shouldRespondWith`
           [json|[{ "id": 3 }, { "id": 4 }]|]
           { matchHeaders = [matchContentTypeJson] }
+
+      it "should work with filters that have the not operator" $ do
+        get "/rpc/get_projects_below?id=5&id=not.gt.2&select=id" `shouldRespondWith`
+          [json|[{ "id": 1 }, { "id": 2 }]|]
+          { matchHeaders = [matchContentTypeJson] }
+        get "/rpc/get_projects_below?id=5&id=not.in.(1,3)&select=id" `shouldRespondWith`
+          [json|[{ "id": 2 }, { "id": 4 }]|]
+          { matchHeaders = [matchContentTypeJson] }
+
+      it "should work with filters that use the plain/phrase with language fts operator" $ do
+        get "/rpc/get_tsearch?text_search_vector=english.fts.impossible" `shouldRespondWith`
+          [json|[{"text_search_vector":"'fun':5 'imposs':9 'kind':3"}]|]
+          { matchHeaders = [matchContentTypeJson] }
+        get "/rpc/get_tsearch?text_search_vector=plain.fts.impossible" `shouldRespondWith`
+          [json|[{"text_search_vector":"'fun':5 'imposs':9 'kind':3"}]|]
+          { matchHeaders = [matchContentTypeJson] }
+        get "/rpc/get_tsearch?text_search_vector=phrase.english.fts.impossible" `shouldRespondWith`
+          [json|[{"text_search_vector":"'fun':5 'imposs':9 'kind':3"}]|]
+          { matchHeaders = [matchContentTypeJson] }
+        get "/rpc/get_tsearch?text_search_vector=not.english.fts.fun%7Crat" `shouldRespondWith`
+          [json|[{"text_search_vector":"'amus':5 'fair':7 'impossibl':9 'peu':4"},{"text_search_vector":"'art':4 'spass':5 'unmog':7"}]|]
+          { matchHeaders = [matchContentTypeJson] }
+        -- TODO: '@@' deprecated
+        get "/rpc/get_tsearch?text_search_vector=english.@@.impossible" `shouldRespondWith`
+          [json|[{"text_search_vector":"'fun':5 'imposs':9 'kind':3"}]|]
+          { matchHeaders = [matchContentTypeJson] }
+        get "/rpc/get_tsearch?text_search_vector=plain.@@.impossible" `shouldRespondWith`
+          [json|[{"text_search_vector":"'fun':5 'imposs':9 'kind':3"}]|]
+          { matchHeaders = [matchContentTypeJson] }
+        get "/rpc/get_tsearch?text_search_vector=phrase.english.@@.impossible" `shouldRespondWith`
+          [json|[{"text_search_vector":"'fun':5 'imposs':9 'kind':3"}]|]
+          { matchHeaders = [matchContentTypeJson] }
+        get "/rpc/get_tsearch?text_search_vector=not.english.@@.fun%7Crat" `shouldRespondWith`
+          [json|[{"text_search_vector":"'amus':5 'fair':7 'impossibl':9 'peu':4"},{"text_search_vector":"'art':4 'spass':5 'unmog':7"}]|]
+          { matchHeaders = [matchContentTypeJson] }
diff --git a/test/fixtures/schema.sql b/test/fixtures/schema.sql
index be35626e3..b10adeb31 100755
--- a/test/fixtures/schema.sql
+++ b/test/fixtures/schema.sql
@@ -1250,6 +1250,10 @@ $$ language sql;
 create function test.privileged_hello(name text) returns text as $$
   select 'Privileged hello to ' || $1;
 $$ language sql;
+
+create function test.get_tsearch() returns setof test.tsearch AS $$
+  SELECT * FROM test.tsearch;
+$$ language sql;
 --
 -- PostgreSQL database dump complete
 --