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-rw-r--r--Utility/HumanTime.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/Utility/HumanTime.hs b/Utility/HumanTime.hs
index 01fbeac..51338b3 100644
--- a/Utility/HumanTime.hs
+++ b/Utility/HumanTime.hs
@@ -44,7 +44,7 @@ daysToDuration :: Integer -> Duration
daysToDuration i = Duration $ i * dsecs
{- Parses a human-input time duration, of the form "5h", "1m", "5h1m", etc -}
-parseDuration :: Monad m => String -> m Duration
+parseDuration :: MonadFail m => String -> m Duration
parseDuration = maybe parsefail (return . Duration) . go 0
where
go n [] = return n