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-rw-r--r--libraries/base/Data/String.hs1
1 files changed, 1 insertions, 0 deletions
diff --git a/libraries/base/Data/String.hs b/libraries/base/Data/String.hs
index 02a720f8e9..bd5d3d0edd 100644
--- a/libraries/base/Data/String.hs
+++ b/libraries/base/Data/String.hs
@@ -5,6 +5,7 @@
{-# LANGUAGE StandaloneDeriving #-}
{-# LANGUAGE Trustworthy #-}
{-# LANGUAGE TypeFamilies #-}
+{-# LANGUAGE TypeOperators #-}
-----------------------------------------------------------------------------
-- |