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-rw-r--r--src/Util/NatUtil.v2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/Util/NatUtil.v b/src/Util/NatUtil.v
index 02122719e..83375f99a 100644
--- a/src/Util/NatUtil.v
+++ b/src/Util/NatUtil.v
@@ -140,7 +140,7 @@ Hint Resolve pow_nonzero : arith.
Lemma S_pred_nonzero : forall a, (a > 0 -> S (pred a) = a)%nat.
Proof.
- destruct a; omega.
+ destruct a; simpl; omega.
Qed.
Hint Rewrite S_pred_nonzero using omega : natsimplify.