diff --git a/wp-includes/js/wp-util.js b/wp-includes/js/wp-util.js
index 1985b35e6f..84cb5510bb 100644
--- a/wp-includes/js/wp-util.js
+++ b/wp-includes/js/wp-util.js
@@ -50,7 +50,8 @@ window.wp = window.wp || {};
 		 *
 		 * @param  {string} action The slug of the action to fire in WordPress.
 		 * @param  {object} data   The data to populate $_POST with.
-		 * @return {$.promise}     A jQuery promise that represents the request.
+		 * @return {$.promise}     A jQuery promise that represents the request,
+		 *                         decorated with an abort() method.
 		 */
 		post: function( action, data ) {
 			return wp.ajax.send({
@@ -65,9 +66,11 @@ window.wp = window.wp || {};
 		 *
 		 * @param  {string} action  The slug of the action to fire in WordPress.
 		 * @param  {object} options The options passed to jQuery.ajax.
-		 * @return {$.promise}      A jQuery promise that represents the request.
+		 * @return {$.promise}      A jQuery promise that represents the request,
+		 *                          decorated with an abort() method.
 		 */
 		send: function( action, options ) {
+			var promise, deferred;
 			if ( _.isObject( action ) ) {
 				options = action;
 			} else {
@@ -81,7 +84,7 @@ window.wp = window.wp || {};
 				context: this
 			});
 
-			return $.Deferred( function( deferred ) {
+			deferred = $.Deferred( function( deferred ) {
 				// Transfer success/error callbacks.
 				if ( options.success )
 					deferred.done( options.success );
@@ -92,7 +95,7 @@ window.wp = window.wp || {};
 				delete options.error;
 
 				// Use with PHP's wp_send_json_success() and wp_send_json_error()
-				$.ajax( options ).done( function( response ) {
+				deferred.jqXHR = $.ajax( options ).done( function( response ) {
 					// Treat a response of `1` as successful for backwards
 					// compatibility with existing handlers.
 					if ( response === '1' || response === 1 )
@@ -105,7 +108,15 @@ window.wp = window.wp || {};
 				}).fail( function() {
 					deferred.rejectWith( this, arguments );
 				});
-			}).promise();
+			});
+
+			promise = deferred.promise();
+			promise.abort = function() {
+				deferred.jqXHR.abort();
+				return this;
+			};
+
+			return promise;
 		}
 	};
 
diff --git a/wp-includes/js/wp-util.min.js b/wp-includes/js/wp-util.min.js
index a74a80f8e5..18db8302e0 100644
--- a/wp-includes/js/wp-util.min.js
+++ b/wp-includes/js/wp-util.min.js
@@ -1 +1 @@
-window.wp=window.wp||{},function(a){var b="undefined"==typeof _wpUtilSettings?{}:_wpUtilSettings;wp.template=_.memoize(function(b){var c,d={evaluate:/<#([\s\S]+?)#>/g,interpolate:/\{\{\{([\s\S]+?)\}\}\}/g,escape:/\{\{([^\}]+?)\}\}(?!\})/g,variable:"data"};return function(e){return(c=c||_.template(a("#tmpl-"+b).html(),null,d))(e)}}),wp.ajax={settings:b.ajax||{},post:function(a,b){return wp.ajax.send({data:_.isObject(a)?a:_.extend(b||{},{action:a})})},send:function(b,c){return _.isObject(b)?c=b:(c=c||{},c.data=_.extend(c.data||{},{action:b})),c=_.defaults(c||{},{type:"POST",url:wp.ajax.settings.url,context:this}),a.Deferred(function(b){c.success&&b.done(c.success),c.error&&b.fail(c.error),delete c.success,delete c.error,a.ajax(c).done(function(a){("1"===a||1===a)&&(a={success:!0}),_.isObject(a)&&!_.isUndefined(a.success)?b[a.success?"resolveWith":"rejectWith"](this,[a.data]):b.rejectWith(this,[a])}).fail(function(){b.rejectWith(this,arguments)})}).promise()}}}(jQuery);
\ No newline at end of file
+window.wp=window.wp||{},function(a){var b="undefined"==typeof _wpUtilSettings?{}:_wpUtilSettings;wp.template=_.memoize(function(b){var c,d={evaluate:/<#([\s\S]+?)#>/g,interpolate:/\{\{\{([\s\S]+?)\}\}\}/g,escape:/\{\{([^\}]+?)\}\}(?!\})/g,variable:"data"};return function(e){return(c=c||_.template(a("#tmpl-"+b).html(),null,d))(e)}}),wp.ajax={settings:b.ajax||{},post:function(a,b){return wp.ajax.send({data:_.isObject(a)?a:_.extend(b||{},{action:a})})},send:function(b,c){var d,e;return _.isObject(b)?c=b:(c=c||{},c.data=_.extend(c.data||{},{action:b})),c=_.defaults(c||{},{type:"POST",url:wp.ajax.settings.url,context:this}),e=a.Deferred(function(b){c.success&&b.done(c.success),c.error&&b.fail(c.error),delete c.success,delete c.error,b.jqXHR=a.ajax(c).done(function(a){("1"===a||1===a)&&(a={success:!0}),_.isObject(a)&&!_.isUndefined(a.success)?b[a.success?"resolveWith":"rejectWith"](this,[a.data]):b.rejectWith(this,[a])}).fail(function(){b.rejectWith(this,arguments)})}),d=e.promise(),d.abort=function(){return e.jqXHR.abort(),this},d}}}(jQuery);
\ No newline at end of file
diff --git a/wp-includes/version.php b/wp-includes/version.php
index c9739ad1a3..f395e143e1 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.3-alpha-32746';
+$wp_version = '4.3-alpha-32747';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.