-var flatMap = require('../array/virtual/flat-map');
+var isPrototypeOf = require('../../internals/object-is-prototype-of');
+var method = require('../array/virtual/flat-map');
var ArrayPrototype = Array.prototype;
module.exports = function (it) {
var own = it.flatMap;
- return it === ArrayPrototype || (it instanceof Array && own === ArrayPrototype.flatMap) ? flatMap : own;
+ return it === ArrayPrototype || (isPrototypeOf(ArrayPrototype, it) && own === ArrayPrototype.flatMap) ? method : own;
};