From 5fc1b4b948e464b0a4efb1373c25de715cdf38bb Mon Sep 17 00:00:00 2001
From: Hong Minhee <hong.minhee@gmail.com>
Date: Fri, 11 Nov 2016 07:10:10 +0900
Subject: [PATCH] Add missing MutableSet abstract base class (#680)

---
 stdlib/3/collections/abc.pyi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/stdlib/3/collections/abc.pyi b/stdlib/3/collections/abc.pyi
index 0eb18b4bd..07b99ad58 100644
--- a/stdlib/3/collections/abc.pyi
+++ b/stdlib/3/collections/abc.pyi
@@ -10,4 +10,5 @@ if sys.version_info >= (3, 3):
         Sequence as Sequence,
         MutableSequence as MutableSequence,
         Set as Set,
+        MutableSet as MutableSet,
     )