diff --git a/lib/core/dispatchRequest.js b/lib/core/dispatchRequest.js
index 9146f27..b511101 100644
--- a/lib/core/dispatchRequest.js
+++ b/lib/core/dispatchRequest.js
@@ -2,7 +2,7 @@
 
 var utils = require('./../utils');
 var transformData = require('./transformData');
-var Cancel = require('../cancel/Cancel');
+var isCancel = require('../cancel/isCancel');
 var defaults = require('../defaults');
 
 /**
@@ -61,7 +61,7 @@ module.exports = function dispatchRequest(config) {
 
     return response;
   }, function onAdapterRejection(reason) {
-    if (!(reason instanceof Cancel)) {
+    if (!isCancel(reason)) {
       throwIfCancellationRequested(config);
 
       // Transform response data