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-rw-r--r--theories/Numbers/Natural/Binary/NBinary.v1
1 files changed, 1 insertions, 0 deletions
diff --git a/theories/Numbers/Natural/Binary/NBinary.v b/theories/Numbers/Natural/Binary/NBinary.v
index e94644c48..93922aa43 100644
--- a/theories/Numbers/Natural/Binary/NBinary.v
+++ b/theories/Numbers/Natural/Binary/NBinary.v
@@ -32,6 +32,7 @@ Qed.
(** Basic operations. *)
Instance eq_equiv : Equivalence (@eq N).
+Local Obligation Tactic := simpl_relation.
Program Instance succ_wd : Proper (eq==>eq) Nsucc.
Program Instance pred_wd : Proper (eq==>eq) Npred.
Program Instance add_wd : Proper (eq==>eq==>eq) Nplus.