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-rw-r--r--plugins/rtauto/Bintree.v2
1 files changed, 1 insertions, 1 deletions
diff --git a/plugins/rtauto/Bintree.v b/plugins/rtauto/Bintree.v
index 598b21d834..626841be8f 100644
--- a/plugins/rtauto/Bintree.v
+++ b/plugins/rtauto/Bintree.v
@@ -94,7 +94,7 @@ Theorem refl_pos_eq : forall m, pos_eq m m = true.
induction m;simpl;auto.
Qed.
-Definition pos_eq_dec (m n:positive) :{m=n}+{m<>n} .
+Definition pos_eq_dec : forall (m n:positive), {m=n}+{m<>n} .
fix 1;intros [mm|mm|] [nn|nn|];try (right;congruence).
case (pos_eq_dec mm nn).
intro e;left;apply (f_equal xI e).