diff --git a/request/request.js b/request/request.js
index 442777f9..304673fc 100644
--- a/request/request.js
+++ b/request/request.js
@@ -70,6 +70,8 @@ module.exports = function($window, Promise) {
 			if (typeof args.config === "function") xhr = args.config(xhr, args) || xhr
 
 			xhr.onreadystatechange = function() {
+				// Don't throw errors on xhr.abort(). XMLHttpRequests ends up in a state of
+				// xhr.status == 0 and xhr.readyState == 4 if aborted after open, but before completion.
 				if (xhr.status && xhr.readyState === 4) {
 					try {
 						var response = (args.extract !== extract) ? args.extract(xhr, args) : args.deserialize(args.extract(xhr, args))