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-rw-r--r--src/FastMutInt.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/FastMutInt.hs b/src/FastMutInt.hs
index 39f4f99b..23001c1f 100644
--- a/src/FastMutInt.hs
+++ b/src/FastMutInt.hs
@@ -1,4 +1,4 @@
-{-# OPTIONS -cpp #-}
+{-# OPTIONS_GHC -cpp -fglasgow-exts #-}
--
-- (c) The University of Glasgow 2002
--