diff --git a/servant-server/src/Servant/Server/Internal.hs b/servant-server/src/Servant/Server/Internal.hs
index 14554441..1ba6012a 100644
--- a/servant-server/src/Servant/Server/Internal.hs
+++ b/servant-server/src/Servant/Server/Internal.hs
@@ -23,7 +23,7 @@ module Servant.Server.Internal
   ) where
 
 #if !MIN_VERSION_base(4,8,0)
-import           Control.Applicative                        ((<$>))
+import           Control.Applicative                        ((<$>), pure)
 #endif
 import           Control.Monad.Trans.Except  (ExceptT)
 import qualified Data.ByteString             as B
diff --git a/servant-server/src/Servant/Server/Internal/Authentication.hs b/servant-server/src/Servant/Server/Internal/Authentication.hs
index 3bbee785..f050969c 100644
--- a/servant-server/src/Servant/Server/Internal/Authentication.hs
+++ b/servant-server/src/Servant/Server/Internal/Authentication.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE CPP                 #-}
 {-# LANGUAGE DataKinds           #-}
 {-# LANGUAGE OverloadedStrings   #-}
 {-# LANGUAGE ScopedTypeVariables #-}
@@ -16,7 +17,11 @@ module Servant.Server.Internal.Authentication
 import           Control.Monad              (guard)
 import qualified Data.ByteString            as B
 import           Data.ByteString.Base64     (decodeLenient)
+#if !MIN_VERSION_base(4,8,0)
 import           Data.Monoid                ((<>), mempty)
+#else
+import           Data.Monoid                ((<>))
+#endif
 import           Data.Proxy                 (Proxy (Proxy))
 import           Data.String                (fromString)
 import           Data.Word8                 (isSpace, toLower, _colon)