X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=System%2FTimeout.hs;fp=System%2FTimeout.hs;h=df33625c8d4cca3f8b51052c4c87492481d4cd5f;hb=4475dcabbc206d1cf0fc3fee88f600a4791d948c;hp=dbd7181b42145957d5688ff8dd8134ec96c9abe0;hpb=7b7fc46fd296030068c6682b37c028656fdf4a55;p=ghc-base.git

diff --git a/System/Timeout.hs b/System/Timeout.hs
index dbd7181..df33625 100644
--- a/System/Timeout.hs
+++ b/System/Timeout.hs
@@ -1,4 +1,7 @@
 {-# LANGUAGE CPP #-}
+#ifdef __GLASGOW_HASKELL__
+{-# LANGUAGE DeriveDataTypeable, StandaloneDeriving #-}
+#endif
 
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