diff --git a/backbone.js b/backbone.js
index 267eedb6..6b566e94 100644
--- a/backbone.js
+++ b/backbone.js
@@ -1147,8 +1147,8 @@
   // right here:
   var collectionMethods = { forEach: 3, each: 3, map: 3, collect: 3, reduce: 4,
       foldl: 4, inject: 4, reduceRight: 4, foldr: 4, find: 3, detect: 3, filter: 3,
-      select: 3, reject: 3, every: 3, all: 3, some: 3, any: 3, include: 2,
-      contains: 2, invoke: 0, max: 3, min: 3, toArray: 1, size: 1, first: 3,
+      select: 3, reject: 3, every: 3, all: 3, some: 3, any: 3, include: 3, includes: 3,
+      contains: 3, invoke: 0, max: 3, min: 3, toArray: 1, size: 1, first: 3,
       head: 3, take: 3, initial: 3, rest: 3, tail: 3, drop: 3, last: 3,
       without: 0, difference: 0, indexOf: 3, shuffle: 1, lastIndexOf: 3,
       isEmpty: 1, chain: 1, sample: 3, partition: 3, groupBy: 3, countBy: 3,