diff --git a/squeal-postgresql/src/Squeal/PostgreSQL/Session.hs b/squeal-postgresql/src/Squeal/PostgreSQL/Session.hs
index 9adf2324..c0fdf71e 100644
--- a/squeal-postgresql/src/Squeal/PostgreSQL/Session.hs
+++ b/squeal-postgresql/src/Squeal/PostgreSQL/Session.hs
@@ -46,7 +46,7 @@ import Control.Monad.Fix (MonadFix(..))
 import Control.Monad.Catch
 import Control.Monad.IO.Class (MonadIO(..))
 import Control.Monad.Morph
-import Control.Monad.Reader (ReaderT(..))
+import Control.Monad.Reader
 import Control.Monad.Trans.Control (MonadBaseControl(..), MonadTransControl(..))
 import UnliftIO (MonadUnliftIO(..))
 import Data.ByteString (ByteString)
diff --git a/squeal-postgresql/src/Squeal/PostgreSQL/Session/Oid.hs b/squeal-postgresql/src/Squeal/PostgreSQL/Session/Oid.hs
index 5380e731..d8c67289 100644
--- a/squeal-postgresql/src/Squeal/PostgreSQL/Session/Oid.hs
+++ b/squeal-postgresql/src/Squeal/PostgreSQL/Session/Oid.hs
@@ -36,7 +36,7 @@ module Squeal.PostgreSQL.Session.Oid
 
 import Control.Monad (when)
 import Control.Monad.Catch (throwM)
-import Control.Monad.Reader (ReaderT(ReaderT))
+import Control.Monad.Reader
 import Data.String
 import GHC.TypeLits
 import PostgreSQL.Binary.Decoding (valueParser, int)