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-rw-r--r--compiler/GHC.hs3
1 files changed, 2 insertions, 1 deletions
diff --git a/compiler/GHC.hs b/compiler/GHC.hs
index 770cdf62b8..e8c81cb8f2 100644
--- a/compiler/GHC.hs
+++ b/compiler/GHC.hs
@@ -2,6 +2,7 @@
{-# LANGUAGE NondecreasingIndentation, ScopedTypeVariables #-}
{-# LANGUAGE TupleSections, NamedFieldPuns #-}
{-# LANGUAGE ViewPatterns #-}
+{-# LANGUAGE PatternSynonyms #-}
{-# LANGUAGE TypeFamilies #-}
-- -----------------------------------------------------------------------------
@@ -28,7 +29,7 @@ module GHC (
needsTemplateHaskellOrQQ,
-- * Flags and settings
- DynFlags(..), GeneralFlag(..), Severity(..), Backend(..), gopt,
+ DynFlags(..), GeneralFlag(..), Severity(..), Backend, pattern NoBackend, ActualBackend(..), gopt,
GhcMode(..), GhcLink(..),
parseDynamicFlags, parseTargetFiles,
getSessionDynFlags,