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-rw-r--r--testsuite/tests/indexed-types/should_fail/T5439.hs1
1 files changed, 1 insertions, 0 deletions
diff --git a/testsuite/tests/indexed-types/should_fail/T5439.hs b/testsuite/tests/indexed-types/should_fail/T5439.hs
index dfcd399b4f..d5be550de5 100644
--- a/testsuite/tests/indexed-types/should_fail/T5439.hs
+++ b/testsuite/tests/indexed-types/should_fail/T5439.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE Haskell2010 #-}
{-# LANGUAGE UnicodeSyntax #-}
{-# LANGUAGE DeriveDataTypeable #-}
{-# LANGUAGE EmptyDataDecls #-}