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-rw-r--r--libraries/base/GHC/IO/Handle/Lock.hsc2
1 files changed, 2 insertions, 0 deletions
diff --git a/libraries/base/GHC/IO/Handle/Lock.hsc b/libraries/base/GHC/IO/Handle/Lock.hsc
index ec85ffd25e..0b700f8944 100644
--- a/libraries/base/GHC/IO/Handle/Lock.hsc
+++ b/libraries/base/GHC/IO/Handle/Lock.hsc
@@ -100,6 +100,8 @@ hTryLock :: Handle -> LockMode -> IO Bool
hTryLock h mode = lockImpl h "hTryLock" mode False
-- | Release a lock taken with 'hLock' or 'hTryLock'.
+--
+-- @since 4.11.0.0
hUnlock :: Handle -> IO ()
hUnlock = unlockImpl