From 9fd4210712eff0c54bd5fc5d4acf865ab0bd5876 Mon Sep 17 00:00:00 2001
From: Ralf Jung <jung@mpi-sws.org>
Date: Wed, 23 Mar 2016 17:51:59 +0100
Subject: [PATCH] fix a typo

---
 prelude/collections.v | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/prelude/collections.v b/prelude/collections.v
index 51f5ec485..e7c050cca 100644
--- a/prelude/collections.v
+++ b/prelude/collections.v
@@ -63,7 +63,7 @@ Section simple_collection.
   Global Instance elem_of_proper :
     Proper ((=) ==> (≡) ==> iff) (@elem_of A C _) | 5.
   Proof. intros ???; subst. firstorder. Qed.
-  Global Instance disjoint_prope : Proper ((≡) ==> (≡) ==> iff) (@disjoint C _).
+  Global Instance disjoint_proper: Proper ((≡) ==> (≡) ==> iff) (@disjoint C _).
   Proof. intros ??????. by rewrite !elem_of_disjoint; setoid_subst. Qed.
   Lemma elem_of_union_list Xs x : x ∈ ⋃ Xs ↔ ∃ X, X ∈ Xs ∧ x ∈ X.
   Proof.
-- 
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