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-rw-r--r--libraries/base/GHC/IO/Handle/Lock/Windows.hsc2
1 files changed, 2 insertions, 0 deletions
diff --git a/libraries/base/GHC/IO/Handle/Lock/Windows.hsc b/libraries/base/GHC/IO/Handle/Lock/Windows.hsc
index 399807b54b..fe6452dbcc 100644
--- a/libraries/base/GHC/IO/Handle/Lock/Windows.hsc
+++ b/libraries/base/GHC/IO/Handle/Lock/Windows.hsc
@@ -1,4 +1,6 @@
{-# LANGUAGE CPP #-}
+{-# LANGUAGE LambdaCase #-}
+{-# LANGUAGE MultiWayIf #-}
{-# LANGUAGE InterruptibleFFI #-}
{-# LANGUAGE NoImplicitPrelude #-}