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-rw-r--r--src/ForwardAD/DualNumbers.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/ForwardAD/DualNumbers.hs b/src/ForwardAD/DualNumbers.hs
index aa35a5b..9a95f81 100644
--- a/src/ForwardAD/DualNumbers.hs
+++ b/src/ForwardAD/DualNumbers.hs
@@ -146,7 +146,7 @@ dfwdDN = \case
(EConstArr ext n t x)
EBuild _ n a b
| Refl <- dnPreservesTupIx n -> EBuild ext n (dfwdDN a) (dfwdDN b)
- EFold1Inner _ a b c -> EFold1Inner ext (dfwdDN a) (dfwdDN b) (dfwdDN c)
+ EFold1Inner _ cm a b c -> EFold1Inner ext cm (dfwdDN a) (dfwdDN b) (dfwdDN c)
ESum1Inner _ e ->
let STArr n (STScal t) = typeOf e
pairty = (STPair (STScal t) (STScal t))