@@ -13,6 +13,7 @@ module Network.Wai.Handler.Warp.HTTP2.Worker (
14#if __GLASGOW_HASKELL__ < 709
14#if __GLASGOW_HASKELL__ < 709
15import Control.Applicative
15import Control.Applicative
16+import Data.Monoid (mempty)
17import Control.Concurrent
18import Control.Concurrent
18import Control.Concurrent.STM
19import Control.Concurrent.STM