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-rw-r--r--src/Haddock/Utils/FastMutInt2.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/Haddock/Utils/FastMutInt2.hs b/src/Haddock/Utils/FastMutInt2.hs
index c47b514b..14273ac6 100644
--- a/src/Haddock/Utils/FastMutInt2.hs
+++ b/src/Haddock/Utils/FastMutInt2.hs
@@ -36,7 +36,7 @@ newFastMutInt :: IO FastMutInt
newFastMutInt = IO $ \s0 ->
case newByteArray# size s0 of { (# s, arr #) ->
(# s, FastMutInt arr #) }
- where I# size = SIZEOF_HSINT
+ where !(I# size) = SIZEOF_HSINT
readFastMutInt :: FastMutInt -> IO Int
readFastMutInt (FastMutInt arr) = IO $ \s0 ->