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-rw-r--r--theories/Numbers/Cyclic/Abstract/NZCyclic.v2
1 files changed, 1 insertions, 1 deletions
diff --git a/theories/Numbers/Cyclic/Abstract/NZCyclic.v b/theories/Numbers/Cyclic/Abstract/NZCyclic.v
index c9f3a774d..7594b0478 100644
--- a/theories/Numbers/Cyclic/Abstract/NZCyclic.v
+++ b/theories/Numbers/Cyclic/Abstract/NZCyclic.v
@@ -106,7 +106,7 @@ Qed.
Theorem one_succ : one == succ zero.
Proof.
-zify; simpl. now rewrite one_mod_wB.
+zify; simpl Z.add. now rewrite one_mod_wB.
Qed.
Theorem two_succ : two == succ one.