diff --git a/wp-admin/includes/revision.php b/wp-admin/includes/revision.php
index c64fa416e9..6af781e757 100644
--- a/wp-admin/includes/revision.php
+++ b/wp-admin/includes/revision.php
@@ -90,6 +90,7 @@ function wp_prepare_revisions_for_js( $post, $selected_revision_id ) {
 			),
 			'date'         => date_i18n( __( 'M j, Y @ G:i' ), $modified_gmt ),
 			'dateShort'    => date_i18n( _x( 'j M @ G:i', 'revision date short format' ), $modified_gmt ),
+			'dateUnix'     => $modified_gmt,
 			'timeAgo'      => human_time_diff( $modified_gmt, $current ),
 			'autosave'     => wp_is_post_autosave( $revision ),
 			'current'      => $revision->post_modified_gmt === $post->post_modified_gmt,
diff --git a/wp-admin/js/revisions.js b/wp-admin/js/revisions.js
index e93be21041..7d42418ba5 100644
--- a/wp-admin/js/revisions.js
+++ b/wp-admin/js/revisions.js
@@ -14,7 +14,7 @@ window.wp = window.wp || {};
 	revisions.log = function() {
 		if ( revisions.debug )
 			console.log.apply( console, arguments );
-	}
+	};
 
 	// wp_localize_script transforms top-level numbers into strings. Undo that.
 	if ( revisions.settings.selectedRevision )
@@ -47,8 +47,13 @@ window.wp = window.wp || {};
 	revisions.model.Revisions = Backbone.Collection.extend({
 		model: revisions.model.Revision,
 
-		comparator: function( revision ) {
-			return revision.id;
+		comparator: function( a, b ) {
+			var a_ = a.get('dateUnix');
+			var b_ = b.get('dateUnix');
+			var cmp = (a_ > b_) - (a_ < b_);
+			if (cmp === 0 && a.id != b.id)
+				cmp = a.id < b.id ? -1 : 1;
+			return cmp;
 		},
 
 		next: function( revision ) {