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-rw-r--r--src/Data/Array/Nested/Ranked.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/Data/Array/Nested/Ranked.hs b/src/Data/Array/Nested/Ranked.hs
index 8591af7..97b4c7c 100644
--- a/src/Data/Array/Nested/Ranked.hs
+++ b/src/Data/Array/Nested/Ranked.hs
@@ -191,7 +191,7 @@ runNest rarr@(Ranked (M_Ranked (M_Nest _ arr)))
| Refl <- lemReplicatePlusApp (rrank rarr) (Proxy @m) (Proxy @(Nothing @Nat))
= Ranked arr
-rzip :: Ranked n a -> Ranked n b -> Ranked n (a, b)
+rzip :: (Elt a, Elt b) => Ranked n a -> Ranked n b -> Ranked n (a, b)
rzip = coerce mzip
runzip :: Ranked n (a, b) -> (Ranked n a, Ranked n b)