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-rw-r--r--libraries/base/Data/String.hs2
1 files changed, 2 insertions, 0 deletions
diff --git a/libraries/base/Data/String.hs b/libraries/base/Data/String.hs
index e9f34a82a9..a7295a2144 100644
--- a/libraries/base/Data/String.hs
+++ b/libraries/base/Data/String.hs
@@ -88,4 +88,6 @@ instance (a ~ Char) => IsString [a] where
-- | @since 4.9.0.0
deriving instance IsString a => IsString (Const a b)
+
+-- | @since 4.9.0.0
deriving instance IsString a => IsString (Identity a)